Asteroid orbit identifying method based on observation angle data

Abstract

The invention discloses an asteroid orbit identifying method based on observation angle data. The method comprises steps as follows: calculation of the change rate, that is, calculation of the observation angle data along with the time change rate; calculation of the angular velocity; screening of the angular velocity: the angular velocity of a current observation arc section is compared with a given threshold, and whether data of the section belong to an asteroid or a man-made earth satellite or are undetermined is judged preliminarily; correlation judgment: observation forecast is performed by using orbit elements of the catalogued man-made earth satellite, theoretically calculated values and measured values of all observation epochs are compared, if the error is small enough, the arc section is judged to belong to the man-made earth satellite, and otherwise, the arc section belongs to the asteroid. The method is convenient and easy to implement, can be applied to multiple research fields related to astronomical observation as well as quick recognition of near-earth asteroids, and wins precious early warning and emergency time for follow-up work.

Description

technical field [0001] The invention relates to the field of space target monitoring and early warning, and more specifically relates to an asteroid orbit identification method based on angle measurement data, which is used to determine whether the orbit of a target celestial body belongs to an asteroid or an artificial earth satellite. Background technique [0002] When using ground-based optical telescopes for observation, the images captured include natural celestial bodies such as galaxies, stars, major planets in the solar system, asteroids, and comets, as well as artificial celestial bodies such as artificial earth satellites and space debris. Through the image, we can obtain the direction information of the celestial body, which is usually described by the two angular measurements of right ascension and declination. Generally speaking, various objects in the image can be distinguished by angular velocity (hereinafter referred to as angular velocity): in the inertial c...

AI Technical Summary

Problems solved by technology

However, for some small near-Earth objects, their angular velocity may be in the same order of magnitude as that of high-orbit satellites (or debris), or even smaller. Therefore, for the observation data of these moving targets in the solar system, certain method to distinguish its category and determine whether it belongs to an asteroid orbiting the sun or an artificial earth satellite orbiting the earth

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