Study of a population of space debris objects with a high area-to-mass ratio in high Earth orbits

The data on 498 space debris objects with a high area-to-mass ratio (HAMR) detected in 2016–2017 were analyzed to identify possible candidates for the role of "parent objects". As a result, the origin of several HAMR fragments was determined. These fragments separated from three different large objects in the geostationary orbit (GEO) region, including two functioning spacecraft and one rocket launcher stage. Observations of these three objects showed that there were no noticeable differences in their light curves, which indicates the absence of significant changes in the geometric shape, reflective characteristics and motion parameters relative to the center of mass. At least, both spacecraft continued to perform retention maneuvers in their positions on the GEO, and no unpredictable changes were detected in the orbital motion and in the stage light curve. Therefore, the formation of newly discovered fragments cannot be associated with the catastrophic destruction of the “parent objects”.</jats:p

On the inclusion of dissipation on top of mean-field approaches

International audienc

New status of ISON - an open international project and database for space debris information exchange.

International Scientific Optical Network (ISON) was an open international scientific project specializing in observations of the near-Earth space objects. Started in Pulkovo observatory in 2004, ISON project then continued in Keldysh Institute of Applied Mathematics RAS (KIAM RAS), and is currently under dedicated company Small Innovation Enterprise "ISON Ballistics-Service" (SIE ISON-BS). With this goal SIE ISON-BS developed the observation scheduling centre and database. A new direction of project development was the arrangement of an international centre for the exchange of measurement and orbital information on space debris. SIE ISON-BS established an international exchange of data with a number of observatories, universities and scientific institutes. Therefore, although the number of observatories of the project has decreased to 22 (telescopes of SIE ISON-BS are now in 14 observation points and there are 8 partner observatories) the volume of measurements in the ISON database has grown few times. In 2022 ISON database received in average daily 120 thousand measurements and obtained to end of year over 45 mln. measurements in almost 5 mln. tracklets, and maintains the orbits of 10086 space objects (3122 GEO, 5267 HEO and 1697 MEO), from that 3226 are objects with high are to mass ratio (including 901 GEO, 1461 HEO and 864 MEO) on 01.09.2023. ISON carries out the scientific and commercial activities under grants and contracts with foreign organizations

Identification of potentially dangerous space objects and conjunctions

Abstract: There are proposals on the methods of solving and the requirements for software implementation of the tasks of identifying and tracking potentially dangerous space objects and conjunctions present in this paper. The statistics of conjunctions in the GEO, MEO and HEO areas in 2018 are given.Note: Research direction:Mathematical modelling in actual problems of science and technic