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Jan 8, 2022
In 2021, the Institute of Applied Mathematics named after M.V. Keldysh of the Russian Academy of Sciences, 5797 measurements for 106 asteroids and 31 comets were received and transferred to the Automated Warning System for Hazardous Situations in Near-Earth Space of the State Corporation Roscosmos.
Among them: for the asteroid (99942) "Apophis" - 339 positional measurements in 28 files (each file contains a set of measurements for one night). At the time of observation, the apparent brightness of the asteroid was about 16 magnitude.
Image above: The footage was taken by the 50-cm telescope of the Kuban State University (KubSU) in Krasnodar (observatory code C40).
The results of the large-scale IAWN * campaign to observe Apophis, carried out in 2020-2021, significantly refined the parameters of its orbital motion. This increased the reliability of long-term forecasts of its approach to the Earth. The new knowledge allowed the celestial mechanics to confidently say that there is no danger of a collision at a probability level higher than 10-6.
Report on the discovery of a new asteroid 2021 UL17, approaching the Earth
From October 27 to December 29, 2021 (in one opposition), the world observatories received 74 positional measurements of the asteroid. The current probability of a collision with the Earth is 1.9 × 10-4 (the probability is 0.02 percent). The updated absolute stellar magnitude is 25.8, which, assuming a standard albedo (reflectivity less than 10 percent), corresponds to an asteroid diameter of about 24 meters and a mass of about 18 thousand tons. The semi-major axis of the 2021 UL17 orbit is 1.08 AU. (1 AU is the distance from the Sun to the Earth), perigee 0.96 AU, inclination 0.66 degrees, orbiting the Sun for 410 days. Based on preliminary calculations, a dangerous approach to Earth is predicted on April 5, 2095. The asteroid belongs to the near-Earth asteroids of the Apollo group.
Image above: The footage was taken by the 50-cm telescope of the Kuban State University (KubSU) in Krasnodar (observatory code C40).
Information support for the activities of the Institute of Applied Mathematics named after M.V. Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences on asteroid-comet hazard was carried out by optical monitoring devices coordinated by the Institute of Applied Mathematics named after M.V. Keldysh RAS, located in Kabardino-Balkaria, Krasnodar Territory, Republic of Crimea, Republic of Altai, Uzbekistan, Georgia and Mexico.
Image above: The footage was taken by the 50-cm telescope of the Kuban State University (KubSU) in Krasnodar (observatory code C40).
* Reference: IAWN (International Asteroid Warning Network) is an international organization founded by the United Nations Office for Outer Space Affairs with the aim of coordinating the efforts of states, international intergovernmental and non-governmental organizations in solving problems of warning and countering the asteroid-cometary hazard. As of early 2022, the IAWN includes 35 members (scientific organizations, space agencies and amateur astronomers), including six RAS institutes.
According to the Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences.
Related links:
ROSCOSMOS Press Release: https://www.roscosmos.ru/33812/
IPM RAS: https://www.roscosmos.ru/tag/ipm-ran/
Asteroid: https://www.roscosmos.ru/tag/asteroid/
Apophis: https://www.roscosmos.ru/tag/apofis/
ASPOS OKP: https://www.roscosmos.ru/tag/aspos-okp/
Images, Text, Credits: ROSCOSMOS/Orbiter.ch Aerospace/Roland Berga.
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