Highlights A simultaneous multi-color survey for GEO is performed. 1697 objects with g’r’i’ measurements are obtained. Cluster behavior and color evolution are discussed.
Abstract Optical surveys play significant roles in space object monitoring and catalog, especially for some unique high-altitude regions like the Geosynchronous Earth Orbit (GEO) region. For object classes identification and space environment models development, besides the orbits additional information like physical properties are required. Non-resolving observation techniques like color photometry can provide such knowledge. Here simultaneous surveys for GEO region in g’r’i’ bands were performed utilizing the CHanging Event Survey (CHES) system of Purple Mountain Observatory. Based on the large amounts of images, the object detection, catalog correlation and multi-color photometry are performed consecutively. Due to the extremely wide field of view of CHES system, the simultaneous multi-band information of 1697 objects is obtained. The distribution and clustering behavior of their color indexes are preliminarily investigated, and the evolution of color with launch age is also analyzed. It is demonstrated that even for the same object class the distribution of color index may be different, and for various objects of the same class multiple clusters of color index are found. It indicates that the color photometry can help to classify object classes and provide useful information for correlating new observations with catalog.
Investigations on simultaneous multi-color photometry survey for GEO region
Advances in Space Research ; 70 , 11 ; 3311-3324
2022-08-03
14 pages
Article (Journal)
Electronic Resource
English
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