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Dong Fang Hong 257

Also called Lobster Eye 1, Longxia yan 1


Designation 45940 / 20051B
Launch date 25 Jul 2020
Country of origin China
Mission Scientific: X-ray astronomy
Perigee/Apogee 489/506 km
Inclination 97.5°
Period 94 min
Launch vehicle Long March #312

To detect dark matter, developed by Nanjing University and Hong Kong University. Co-operation between mainland China and Hong Kong in space exploration through the commercial space model.

The satellite is equipped with an internally developed "Lobster-Eye" focused X-ray detector and a small high-precision payload platform. During the satellite's long-term orbit operation, it will verify the ultra-large X-ray field-of-view within the X-ray energy regime and complete several important space X-ray detection experiments. This especially includes carrying out dark matter signal detection research within the X-ray energy regime under Earth orbit environment.

Based on the "Lobster-Eye" focusing light theory, the X-ray imaging technology was first proposed in the 1970s, with advantages of large field-of-view, small size, light weight and easy assembly, etc., making it highly suitable for space payload applications. The "Lobster-Eye X-ray Satellite" will be the world's first in-orbit space exploration satellite equipped with such Lobster-Eye focused X-ray imaging technology.

End of life

Decay 15 Jul 2023

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