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Academic literature on the topic 'Ephemeroid plants'

Author: Grafiati

Published: 4 June 2025

Last updated: 23 June 2025

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Journal articles on the topic "Ephemeroid plants"

1

Kadirova, Khulkaroy. "Floristic composition of Sukh District of Fergana Region." E3S Web of Conferences 452 (2023): 01039. http://dx.doi.org/10.1051/e3sconf/202345201039.

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The article reviews the research conducted in the Sukh district, which is currently a tourism region of Uzbekistan, the floristic composition of the Sukh district and the types of ephemeral and ephemeroid plants in Sukh district, the list of medicinal plants among them, and the distribution percentage in the district in the section of families are highlighted.At the same time, based on the information provided in the existing herbarium funds and literature, brief information about the composition of the species and its distribution areasand some discussions on carrying out targeted research on ephemeris and ephemeroids distributed in the flora of Sukh district are presented.

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Oksana, Shevchuk, Kryklyva Svetlana, Shevchuk Victoria, Khodanitska Olena, Tkachuk Olesya, and Vergelis Victoria. "Species structure of the ephemeroids of the regional park of local importance «Nemyriv Pobuzhia» near the village of Hvozdiv." ScienceRise:Biological Science, no. 1(22) (February 28, 2020): 39–43. https://doi.org/10.15587/2519-8025.2020.198951.

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Analyzing the literature data, it was found, that the majority of ephemeroids that grown in the territory of Ukraine are directly or indirectly influenced by humans, which leads to accelerated rates of decrease in their number. Urban factors influence not only the species structure of populations, but also their absolute quantitative indicators. <strong>The purpose of the research </strong>was to study the floristic composition of ephemeroid plants in the territory of a landscape park of local importance «Nemyrivske Pobuzhya» near the village of Gvozdiv, Nemyriv, district of Vinnytsia region. <strong>Materials and methods. </strong>The study of the floristic composition of ephemeroid plants in the territory of the landscape park of local importance "Nemyrivske Pobuzhzhya" was carried out by the expedition-route method, as well as by the accidental-regulatory method - laying of accounting sites with an area of 1 m2. The systematic identification of plants was determined using a designator. The abundance of species was determined by the Gult-Drude scale (with the addition of A. Uranov and P. Yaroshenko). The meeting coefficient (%) was determined by the formula: R = a x 100 / n. <strong>Results. </strong>It was revealed, that on the territory of Nemyrivske Pobuzhya the structure of the ephemeroid plants includes 27 species of plants, belonging to 19 genus, 14 families, 12 orders and 2 classes. Such orders as Ranunculales (7 species or 25.9 % of the total ephemeroid species), Papaverales (4 species or 14.8 %), Liliales (4 species or 14.8 %), Amaryllidales (3 species or 11.1%), Capparales (2 species or 7.4 %) are represented by the largest number Anemone sylvestris L., Ficaria verna L., Viola odorata L., Galanthus nivalis L. were dominant among the species. <strong>Conclusions.</strong> <strong> </strong>It was established, that Galanthus nivalis L. is one species that is growing at the researched area and registered in the IUCN Red List of Threatened Species; and two species (Allium ursinum L. and Galanthus nivalis L.), included in the «European Red List». 6 species of ephemeroids are included in the Red Book of Ukraine: Leucojum vernum L., Allium ursinum L., Galanthus nivalis L., Crocus reticulatus Stev. ex Adams., Pulsatilla grandis Rupr. and Pulsatilla pratensis L. (Mill). 4 species of plants have the status of rare plants of regional importance: Anemone sylvestris L., Dentaria bulbifera L., Dentaria quinquefolia M. Bieb. and Primula veris L.

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Teteryuk, Lyudmila V., Olga E. Valuyskikh, and Olga F. Kirsanova. "Distribution, population status and protection of rare ephemeroids in the Komi Republic." Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya, no. 53 (2021): 89–108. http://dx.doi.org/10.17223/19988591/53/5.

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Here, we report the data on modern state and protection prospects of plant species Anemone altaica Fisch. ex C.A.Mey., Anemone nemorosa L., Anemone ranunculoides L., Ficaria verna Huds. (Ranunculaceae), Corydalis solida (L.) Clairv. (Papaveraceae) and Gagea samojedorum Grossh. (Liliaceae) in the taiga zone of the Komi Republic. These ephemeroid species require a special research due to their biological features (short periods of vegetation in the spring and subtle presence in communities at later dates) and geographic localization. One of the species, Gagea samojedorum is an endemic of the Urals, other species are presented by populations on the border of their distribution areas. Until recently, studies of early-flowering ephemeroids in the north-east Russia have not been performed. However, such studies become more and more important due to an active industrial development of the North. To assess the prospects for the conservation of rare early-flowering ephemeroids, we carried out work to clarify the number of locations of species on the territory of the Komi Republic, compiled maps of their distribution (See Fig. 1), collected and summarized information about the area, the number and the structure of 44 coenopopulations (See Tables 1 and 2), as well as identified limiting factors. It is shown that at the edge of the distribution area, ephemeroid species often have fragmented habitat range due to ecological and phytocoenotical preferences. They occur sporadically in the river and stream floodplains (sometimes at limestones) where soils are moist and fertile. In the floodplain meadows and forests, ephemeroids can form one-two species ecotopical assemblages. The populations of ephemeroids are linear, often with a high number of individuals. Self-recovering of short-root Anemone altaica, A. nemorosa, A. ranunculoides and root-tuber Ficaria verna is made, mainly, by vegetative reproduction. Tuber species Corydalis solida is propagated only by seeds. The ontogenetic structure of populations indicates a decline in seed and vegetative reproduction rate in these species at the edges of distribution areas (See Fig. 2 and 3). The Ural endemic Gagea samojedorum occurs in herbal habitats and sparse forests in foothill and mountain areas of the Ural Mountains, where it forms abundant populations with the prevalence of young individuals. A high reproduction rate of Gagea samojedorum is due to the variability of vegetative reproduction. In the Komi Republic, the anthropogenic impact on the ephemeroid species is low due to a low level of industrial development and population. Natural abiotic and biotic factors are more significant here and may weaken species positions in plant communities, as well as limit the growth, development and self-recovering of the populations. By now, Anemone altaica, A. nemorosa, A. ranunculoides, Corydalis solida, Ficaria verna and Gagea samojedorum have been included in regional Red Books of plants with the protection category 3 (rare). The main reasons for their inclusion are the edge location, small number, isolation of the local populations and often relic origin. Gagea samojedorum is also an endemic species. The object of the UNESCO World Heritage List “Virgin Komi Forests” and the number of regional reserves are important for the preservation of ephemeroid plants in the North.

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Sitpayeva, G. T., I. G. Otradnykh, and I. A. Syedina. "Collection of rare plant species of Kazakhstan in the conditions of the botanical garden of Almaty." Проблемы ботаники южной сибири и монголии 20, no. 1 (2021): 404–8. http://dx.doi.org/10.14258/pbssm.2021081.

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The collection of rare species in the botanical garden of Almaty (Kazakhstan) consists of 36 species of rareplants. The Botanical garden is located in the foothill zone of the Zailiysky Alatau ridge, which is part of the Northern TienShan mountain system. A collection of rare and endemic species from the mountainous regions of the Northern, Western Tien Shan, and the Kazakh Altai was created, but most of their work was carried out in the mountains of the NorthernTien Shan. The largest species composition of the collection are groups of plants of the genera Tulipa – 25 %, Iris –14 %,Allium – 8.3 %. The largest ecological group in the collection of rare species is represented by ephemeroid geophytes. Introduction tests have shown that ephemeroid drought-resistant plants adapt best to the conditions of the foothill zone of theTrans-Ili Alatau. Xerophyte plants are short-lived, often suffer from the accumulation of snow in winter and the abundance of spring precipitation. Mesophytic plants are prone to drying out from lack of humidity and high air temperaturesin the summer.

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Кuzmishyna, I., V. Vojtiuk, V. Derkach, N. Merlenko, and O. Bezsmertna. "Spring flora of Lutsk and Partisan forestry of Kivertsiv National Natural Park "Tsumanska Puscha"." Bulletin of Taras Shevchenko National University of Kyiv. Series: Biology 85, no. 2 (2021): 27–32. http://dx.doi.org/10.17721/1728_2748.2021.85.27-32.

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In the frame of identification of the Ukrainian Polissya rare vegetation the most attention is paid to the boreal species and groups. Deciduous forests with sinuses of spring ephemeroids remain unstudied in Polissya that's why the urgency of their research in the forests of Volyn Polissya is important, especially in the Kivertsy National Nature Park "Tsumanska Pushcha". The research of the spring ephemeroids composition and rare plant species identification on the territory of the plots of "Volyn Military Forestry" and "Tsumanske Forestry" within the Kivertsy National Nature Park "Tsumanska Pushcha" were aim of the study. At the beginning of the 2021 vegetation period 16 spring ephemeroids were found in 38 parcel of Lutsk forestry and 41 parcel of the Partisan Forestry (both belong to the Kivertsy NPP "Tsumanska Pushcha") by the employees of the NPP together with the scientists of Volyn National University named after Lesya Ukrainka. There were identified Adoxa moschatellina L., Allium ursinum L., Anemone nemorosa L., A. ranunculoides L., Corydalis cava Schweigg. et. Korte., C. solida (L.) Clairv., Dentaria glandulosa Waldst. & Kit., Ficaria verna Huds., Hepatica nobilis Mill., Isopyrum thalictroides L., Lathraea squamaria L., Lathyrus vernus (L.) Bernh., Mercurialis perennis L., Primula veris L., Pulmonaria obscura Dumort., Ranunculus cassubicus L. The monitoring research was set for populations of Allium ursinum (Ukrainian Red Data Book) and regional rare species in Volyn Region: Corydalis cava, Dentaria glandulosa, Hepatica nobilis, Isopyrum thalictroides, Hepatica nobilis (spring ephemeroids), Vinca minor (spring-flowering species) and Hedera helix (wintergreen species). The studied ephemeroid plants amount 2.52 % of the total number of vascular plants of Tsumanska Pushcha and 1.14 % of the flora of Volyn Polissya. According to the results of monitoring studies for Allium ursinum, the coenopopulation of the species generally has a left-handed spectrum, remains homeostatic, and the number of individuals is maintained by seed and vegetative propagation. Creation of the ecological trail "Spring-flowering plants of Kivertsy NPP "Tsumanska Pushcha" is proposed.

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Abdurazzakova, Maftuna G'ayrat qizi. "THE PROPERTIES OF MEDICINAL PLANTS." GEOGRAPHIC RESEARCH: INNOVATIVE IDEAS AND PROSPECTS FOR DEVELOPMENT 1, no. 1 (2023): 3. https://doi.org/10.5281/zenodo.7506172.

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This article describes in detail the geographical distribution of medicinal plants, their use in medicine, the chemical composition, use and properties of medicinal plants.There is also information about the role of medicinal plants in human life.    

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Elesova, Natalja, Marina Silanteva, and Liudmila Sokolova. "Rare Plants and Plant Communities of the Projected “Togul” National Park (Altai Region)." BIO Web of Conferences 16 (2019): 00007. http://dx.doi.org/10.1051/bioconf/20191600007.

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The value of the Salair Ridge territory for the creation of the “Togul” National Natural Park is determined primarily by the natural complex of black coniferous forests with the participation of relict plant species of the Miocene-Pliocene coniferous-deciduous forests and a group of early flowering ephemeroid plants, old-aged Pinus sibirica, Picea obovata and linden forests and a variety of tall grasses. Based on the performed geobotanical descriptions, the phytocenotic characteristic of linden forests was compiled. Information is provided on the location of 10 rare and endangered species of plants and fungi found during a survey of the territory of the planned national park.

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SHavkat Rashidovich, Ubaydullayev, and Mamatov Farmon Murtozevich. "The phytogenic effect of different-aged black saxaul plants on the productivity of wormwood-ephemeral vegetation under the conditions of Karnabchul." Ekologiya i stroitelstvo 01, no. 01 (2019): 30–39. http://dx.doi.org/10.35688/2413-8452-2019-01-005.

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The aim of the study is to determine the effect of different-age black saxaul plants on the productivity of wormwood-ephemeral vegetation through the study of the phytogenic field of this ephemeroid species. The phytogenic field of black saxaul has been studied by the phytomer method in the desert Karnabchul. The study showed that its influence in the minimum phytogenic field on the productivity of wormwood-ephemeral vegetation is negative, in the external part of the phytogenic field on bluegrass and forbs is positive, and on wormwood and sedge remains negative. The highest productivity indices are observed in them between the outer and inner and outer parts of the phytogenic field of the middle-aged generative plants of the edificator.

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Shamsutdinov, N. Z., V. V. Sanzeev, and Z. Sh Shamsutdinov. "Ecological restoration of fodder productivity of degraded pastures in the foothill desert zone of Central Asia." IOP Conference Series: Earth and Environmental Science 901, no. 1 (2021): 012033. http://dx.doi.org/10.1088/1755-1315/901/1/012033.

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Abstract Irrational, ecologically unregulated economic activity in the vast deserts of Central Asia has led to biodiversity depletion, decrease in the fodder productivity of natural pastures and, as a result, deterioration in the fodder base of grassland farming. Forage production of these degraded pastures requires ecological restoration. To enrich the species composition and to increase the fodder productivity of degraded pastures we conducted strip sowing of black saxaul. Restorative succession on degraded pastures led to the formation of a long-term halophytic shrub-ephemeral pasture community consisting of two layers: upper (I) layer represented by black saxaul and lower (II) layer composed of ephemeroids, ephemerals and annual saltwort. Ephemerals are short-growing fodder plants (March–April); Haloxylon aphyllum refers to long-growing (226–242 days) fodder plants, which sprout in the period from late March to early December. Annual salsolas Salsola carinata and Halocharis hispida develop well under the crown of Haloxylon aphyllum. Here they are much larger than between the crowns. The shrub-ephemeral pasture community is dominated by annual grasses and Poa bulbosa. They are mainly concentrated on the outer border of the undercrown ring and are characterized by lush development. In the halophytic semi-shrub-ephemeroid pasture community, the total yield of forage mass of ephemera was 0.90 t/ha; the total yield of forage mass of annual saltwort was 0.14 t/ha; the total yield of forage mass of Haloxylon aphyllum was 0.89 t/ha; the total yield of forage mass was 1.93 t/ha.

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ШКУРА, Тетяна Володимирівна. "ІСТОРІЯ ВИВЧЕННЯ ТА ОХОРОНИ РІДКІСНИХ СТЕПОВИХ ЕФЕМЕРОЇДІВ ЛІВОБЕРЕЖНОГО ПРИ-ДНІПРОВ'Я". Біологія та екологія 5, № 2 (2018): 40–48. https://doi.org/10.5281/zenodo.2366550.

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The results of history of study and guard of rare steppe ephemeroids of Left-bank Pridniprov’ya are resulted in the article. Four periods and two stages which differ different directions are debeneesse selected. The first period (the middle of the XIX th – the end of the XIX th century) is characterized information about the separate locations of steppe ephemeroids, which found out during floral studies. In the third period (1970–2000) priority is sozologichniy direction of researches, next to floristichnim and fitocenotichnim; all together they were directed on an exposure and maintainance of new locations of rare steppe plants, brought to the first edition of the Red book of Ukraine (Crocus reticulatus Steven ex Adam, Bulbocodium versicolor (Ker. Gawl.) Spreng.), and also to the lists of plants which are guarded in the Poltava area (Bellevalia sarmatica (Pall. ex Georgi) Woronow, Hyacinthella leucophaea (K. Koch.) Schur, Muscari neglectum Guss. ex Ten.). The first stage (1970–1990) differs the new finds of Crocus reticulatus, Bulbocodium versicolor, Hyacinthella leucophaea (over 70 standards are kept in the funds of PW) and creation of a few botanical zakaznikiv, on initiative the Poltava botanists. Most of locations all five kinds was discovered in 90th (second stage) during optimization naturally commandment networks of the Poltava area. Most steppe areas with numeral population of rare steppe ephemeroides entered in the complement of naturally commandment networks (29 objects). The feature of fourth period (2000 till present time) is a lead through of complex botanical researches on existent and designed territories naturally commandment networks, in thereby establishment of population surveys is in LP, theoretical and practical developments in relation to reelecting of regional and national eko-networks.

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Books on the topic "Ephemeroid plants"

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Espenak, Fred. Twelve-year planetary ephemeris, 1995-2006. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1994.

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Espenak, Fred. Twelve-year planetary ephemeris, 1995-2006. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1994.

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Espenak, Fred. Twelve-year planetary ephemeris, 1995-2006. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1994.

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Espenak, Fred. Twelve-year planetary ephemeris, 1995-2006. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1994.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., ed. Twelve-year planetary ephemeris, 1995-2006. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1994.

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Espenak, Fred. Twelve-year planetary ephemeris: 1995-2006. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1994.

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Espenak, Fred. Ten year planetary ephemeris: 1986-1995. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Raphael. Raphael's astronomical ephemeris of the planets places for 1989. Foulsham, 1988.

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F, Michelsen Neil, ed. The new American midpoint ephemeris, 2006-2020. Starcrafts Pub., 2007.

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Pottenger, Rique. The new American midpoint ephemeris, 2006-2020. Starcrafts Pub., 2007.

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Book chapters on the topic "Ephemeroid plants"

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Eroshkin, G. I., N. I. Glebova, M. A. Fursenko, and A. A. Trubitsina. "Some Aspects of Constructing Long Ephemerides of the Sun, Major Planets and the Moon: Ephemeris AE95." In Dynamics and Astrometry of Natural and Artificial Celestial Bodies. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5534-2_32.

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Belikov, M. L., V. N. Boyko, N. I. Glebova, et al. "The Main Stages of the Construction of AE89—The Numerical Ephemeris of the Planets and the Moon." In Inertial Coordinate System on the Sky. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0613-6_66.

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Emelyanov, Nikolay. "Estimation of the accuracy of planetary satellite ephemeris." In The Dynamics of Natural Satellites of the Planets. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-822704-6.00013-3.

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Feldman, Gerald D. "Introduction." In The Great Disorder. Oxford University PressNew York, NY, 1993. http://dx.doi.org/10.1093/oso/9780195037913.003.0001.

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Abstract It was, a novelist wrote only a few years after the German inflation had ended, “an extraordinary time. Disorder seemed to be trump, even in the heavens. The constellations were certainly in a wild state and demanded that things be so—for it was a time when one had to believe in all that again, in planets and the stars under which one was born.”1 Of course, if one knew how to penetrate the meaning of the stars, the disorder was only apparent. An astrologer, writing in the midst of the hyperinflation of 1923 and carefully correlating the movements of the currency exchange rates published in the economic section of the Frankfurter Zeitung with those of the planets provided by the undoubtedly less widely consulted Astronomical Ephemeris of Raphael, confidently provided his readers with an astrological explanation of the development of the exchange rate between 1914 and 1922 along with a prognosis for 1923–1926.

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Zharkova, Valentina. "Millennial Oscillations of Solar Irradiance and Magnetic Field in 600–2600." In Solar Planets and Exoplanets [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96450.

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Daily ephemeris of Sun-Earth distances in two millennia (600–2600) showed significant decreases in February–June by up to 0.005 au in millennium M1 (600–1600) and 0.011au in millennium M2 (1600–2600). The Earth’s aphelion in M2 is shorter because shifted towards mid-July and perihelion longer because shifted to mid-January naturally explaining two-millennial variations (Hallstatt’s cycle) of the baseline solar magnetic field measured from Earth. The S-E distance variations are shown imposed by shifts of Sun’s position towards the spring equinox imposed by the gravitation of large planets, or solar inertial motion (SIM). Daily variations of total solar irradiance (TSI) calculated with these S-E distances revealed TSI increases in February–June by up to 10–12 W/m2 in M1 and 14–18 W/m2 in M2. There is also positive imbalance detected in the annual TSI magnitudes deposited to Earth in millennium M2 compared to millennium M1: up to 1.3 W/m2, for monthly, and up to 20–25 W/m2 for daily TSI magnitudes. This imbalance confirms an ascending phase of the current TSI (Hallstatt’s) cycle in M2. The consequences for terrestrial atmosphere of this additional solar forcing induced by the annual TSI imbalances are evaluated. The implications of extra solar forcing for two modern grand solar minima in M2 are also discussed.

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Conference papers on the topic "Ephemeroid plants"

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Saroufim, Joe, and Zaher M. Kassas. "LEO Ephemeris Error Modeling Enabling Long Baseline Correction for Improved PNT." In 2025 IEEE/ION Position, Location and Navigation Symposium (PLANS). IEEE, 2025. https://doi.org/10.1109/plans61210.2025.11028190.

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Kassas, Zaher M., Joe Saroufim, Samer Hayek, Sharbel Kozhaya, and Will Barrett. "Towards Navigation with Non-Cooperative LEO Satellites: Resolving Ephemeris and Timing Errors." In 2025 IEEE/ION Position, Location and Navigation Symposium (PLANS). IEEE, 2025. https://doi.org/10.1109/plans61210.2025.11028189.

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Hayek, Samer, and Zaher M. Kassas. "Warm Start Navigation with Non-Cooperative LEO Satellites via Online Ephemeris Error Estimation." In 2025 IEEE/ION Position, Location and Navigation Symposium (PLANS). IEEE, 2025. https://doi.org/10.1109/plans61210.2025.11028338.

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Хрынова, Т. Р. "TAXONOMICAL ANALYSIS OF THE COLLECTION OF ONIONS ( L., AMARYLIDACEAE J.St.-Hil.) IN THE UNN BOTANICAL GARDEN." In Сотрудничество ботанических садов в сфере сохранения ценного растительного генофонда. Материалы Международной научной конференции, посвященной 10-летию Совета ботанических садов стран СНГ при МААН. Crossref, 2022. http://dx.doi.org/10.35102/cbg.2022.76.82.056.

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Род Allium L. интересен своим разнообразием и включает декоративные, лекарственные и пищевые растения, эфемероиды и длительной вегетации, корневищные и луковичные. В экспозициях Ботанического сада ННГУ представлено 97 образцов 68 наименований луков из 33 секций 12 подродов. За период с 2001 г. было испытано 358 образцов 123 наименований, имеющихся сейчас и выпавших из коллекции за этот период. Сделана оценка проблематичности выращивания представителей различных таксонов. The genus Allium L. is interesting for its diversity and includes ornamental, medicinal and food plants, ephemeroids and long vegetation, rhizomatous and bulbous. The expositions of the Botanical Garden of the UNN present 97 plant samples of 68 names from 33 sections of 12 subgenera. Since 2001, a total of 358 plant samples of 123 names have been tested, which are now available or dropped out of the collection during this period. An assessment was made of the problematic nature of growing representatives of various taxa.

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Tang, Haochen, Sam Pullen, Per Enge, et al. "Ephemeris type a fault analysis and mitigation for LAAS." In 2010 IEEE/ION Position, Location and Navigation Symposium - PLANS 2010. IEEE, 2010. http://dx.doi.org/10.1109/plans.2010.5507218.

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Joerger, Mathieu, Stefan Stevanovic, Samer Khanafseh, and Boris Pervan. "Differential RAIM and relative RAIM for orbit ephemeris fault detection." In 2012 IEEE/ION Position, Location and Navigation Symposium - PLANS 2012. IEEE, 2012. http://dx.doi.org/10.1109/plans.2012.6236879.

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Cho, Deuk Jae, Ho Cheol Jeong, and Sang Hyun Park. "Assessment of precise GPS ephemeris and clock in the International GNSS service." In 2010 IEEE/ION Position, Location and Navigation Symposium - PLANS 2010. IEEE, 2010. http://dx.doi.org/10.1109/plans.2010.5507292.

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Киселева, О. А. "Phenological features of early FLOWERING HERBACEOUS perennials from Institute Botanic Garden UB RAS." In Сотрудничество ботанических садов в сфере сохранения ценного растительного генофонда. Материалы Международной научной конференции, посвященной 10-летию Совета ботанических садов стран СНГ при МААН. Crossref, 2022. http://dx.doi.org/10.35102/cbg.2022.28.55.062.

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Изучены биологические особенности весеннецветущих травянистых интродуцентов в регионе. На материале наблюдений вегетационного сезона 2017-2021 гг. показано, как в течение короткого периода климатической весны (38 дней) накладываются сроки цветения видов. Фенологические характеристики растений, зацветающих до 1 июня на Среднем Урале, включая луковичные эфемероиды и корневищные многолетники необходимы для оптимизации цветочных композиций по срокам цветения. Полученные среднемноголетние данные отражают специфику климатических изменений в регионе. The biological features of early flowering herbaceous plants introduced in the region were studied. Phenological observations during growing season 2017-2021 shown how the flowering periods of the species superimpose during a short period of climatic spring (38 days). Phenological characteristics of plants blooming before June in the Middle Urals, including bulbous ephemeroids and rhizomatous perennials, are necessary to optimize flower compositions. The obtained average long-term data reflect the specifics of climate change in the region.

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Kuznetsov, V., and Yu Chernetenko. "Determination of the mass of asteroid (16) Psyche and masses of other asteroids of the taxonomic class M by the dynamic method." In Modern astronomy: from the Early Universe to exoplanets and black holes. Special Astrophysical Observatory of the Russian Academy of Sciences, 2024. https://doi.org/10.26119/vak2024.146.

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We use the dynamical method of estimation of the mass of perturbing asteroid by its gravitation influence on test asteroids. The positional observations of test asteroids from Minor Planet Center database and Focus Product Release of Gaia cosmic telescope are employed. The calculation of coordinates of perturbing planets is based on the ephemeris DE440. The set of test asteroids is used for estimation of perturbing mass. This set was collected by error of the mass of the perturbing asteroid for each test object. The number of test asteroids was selected particularly for each estimated mass. For the mass of asteroid (16) Psyche a value equal to \mbox{$(1.1868\pm0.0092) 10^{-11} M_{\odot}$} was obtained. The masses of sixteen asteroids with numbers 55, 69, 75, 77, 83, 92, 97, 110, 129, 135, 201, 325, 441, 498, 516, and 739, that are from the taxonomic class M were estimated also. The estimated masses more than twice exceed their errors.

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Panicucci, Paolo, Eleonora Andreis, Fabio Ornati, and Francesco Topputo. "Towards Validation and Verification of Autonomous Vision-Based Navigation for Interplanetary Spacecraft." In ESA 12th International Conference on Guidance Navigation and Control and 9th International Conference on Astrodynamics Tools and Techniques. ESA, 2023. http://dx.doi.org/10.5270/esa-gnc-icatt-2023-112.

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Abstract The number of spacecraft launched per year is increased dramatically in the last decades granting access to private companies and public actors. Space assets are becoming crucial to asses disaster monitoring, precise agriculture, and global network interconnections. This trend is not limited to Earth observation applications, but it extends beyond Earth's orbit to support space exploration and exploitation. The current paradigm to operate interplanetary spacecraft strongly relies on the Deep-Space Network (DSN) which communicates with the spacecraft to obtain range and range-rate measurements. These data are then processed by large teams of engineers on ground to solve the orbit determination problem and the required maneuvers. Although this process is extremely precise and has been used since the beginning of space exploration, the increasing number of spacecraft and the riskier operations needed to support compelling science are making it outdated. First, the DSN has a limited number of communication slots which implies that a small number of spacecraft can be operated. Second, the process is extremely costly as large teams of individuals are involved in it. Finally, the delayed communications between the spacecraft and the ground station make some operations, such as landing or sampling, infeasible as the spacecraft does not have the needed reactivity. Because of these reasons, autonomous navigation is becoming a crucial technology for present and future missions. Among all the navigation sensors, cameras are generally preferred because they are light, compact, and low-priced. For this reason, Vision-Based Navigation (VBN), i.e., the combination of camera and image processing (IP) algorithms, is generally employed as an autonomous solution to solve the navigation problem. When a spacecraft is on an interplanetary cruise, it can determine its position by using known planet position within the Solar System. When the planet lines of sight (LoS) measurements are available, the spacecraft can triangulate its position in the inertial reference frame by knowing the planet ephemeris. This can be performed statically [1, 2], when more than one planet is available, or dynamically, by providing the LoSes measurements history to a navigation filter [3, 4]. The planet LoS determination can be performed by extracting the planet position from images by performing attitude determination and by knowing the planet ephemeris [5, 6]. This is a fully autonomous solution as the spacecraft does not require any piece of information from ground. The proposed solution is thus composed of an IP pipeline, which determines autonomously its attitude and extracts the planet LoSes, and a navigation filter, which determines the spacecraft state by taking into account light aberrations [7]. An important step to be performed is the algorithm validation process which is generally performed by increasing the simulation framework complexity and by including hardware-in-the-loop (HIL) components. Andreis et al. [4] develops and analyses the navigation filtering strategy to be deployed on board by assuming IP behavioral model, while Andreis et al. [6] and Andreis et al. [5] develop the IP pipeline and test it on synthetic images from a custom-designed rendering engine [8]. Andreis et al. [7] further develop the VBN algorithm by proposing an integrated solution to compensate for light aberrations. Finally, Panicucci et al. [9] assesses the IP performances on images acquired on RETINA, a HIL optical navigation test bench. In this context, a high-resolution screen stimulates a camera to acquire images as they would be taken in orbit. Standing on previous work, this paper presents the validation of the VBN algorithm on HIL simulation. First, a series of images are acquired on RETINA by simulating the reference trajectory and the attitude profile of the spacecraft. These images are processed sequentially by the VBN algorithm. Spacecraft state estimates are compared against the true value to assess navigation accuracy. Acknowledgments This research is part of EXTREMA, a project that has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 864697). References [1] V. Franzese and F. Topputo. Optimal beacons selection for Deep-Space optical navigation. The Journal of the Astronautical Sciences, 67(4):1775–1792, 2020. doi: 10.1007/s40295-020-00242-z. [2] S. B. Broschart, N. Bradley, and S. Bhaskaran. Kinematic approximation of position accuracy achieved using optical observations of distant asteroids. Journal of Spacecraft and Rockets, 56 (5):1383–1392, 2019. doi: 10.2514/1.A34354. [3] R. R. Karimi and D. Mortari. Interplanetary autonomous navigation using visible planets. Journal of Guidance, Control, and Dynamics, 38(6):1151–1156, 2015. doi: 10.2514/1.G000575. [4] E. Andreis, V. Franzese, and F. Topputo. Onboard Orbit Determination for Deep-Space CubeSats. Journal of Guidance, Control, and Dynamics, pages 1–14, 2022. doi: 10.2514/1.G006294. [5] E. Andreis, P. Panicucci, and F. Topputo. An Image Processing Pipeline for Autonomous Deep-Space Optical Navigation. Journal of Spacecraft and Rockets, Under Review. [6] E. Andreis, P. Panicucci, V. Franzese, and F. Topputo. A Robust Image Processing Pipeline for Planets Line-Of-sign Extraction for Deep-Space Autonomous Cubesats Navigation. In 44th AAS Guidance, Navigation and Control Conference, pages 1–19, 2022. [7] E. Andreis, P. Panicucci, V. Franzese, and F. Topputo. A Vision-Based Navigation algorithm for Autonomous Deep-Space Cruise. In 3rd Space Imaging Workshop, 2022. [8] S. Bella, E. Andreis, V. Franzese, P. Panicucci, and F. Topputo. Line-of-Sight Extraction Algorithm for Deep-Space Autonomous Navigation. In 2021 AAS/AIAA Astrodynamics Specialist Conference, pages 1–18, 2021. [9] P. Panicucci, Andreis E., V. Franzese, and F. Topputo. An Overview of the EXTREMA Deep-Space Optical Navigation Experiment. In 3rd Space Imaging Workshop, 2022.

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