Key statistics
Satellite OBJECT D at a glance.
Uptime
1303
Days in orbit
Revolutions
≈ 14.0
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
97.5
Latest
Satellite identification and parameters
Extended collection of information and parameters for OBJECT D.
Object identification
Identified? True
Debris? False
Object name: OBJECT D
International designator: 2021-091D
Object number (NORAD): 49318
Object ID (CCSDS): 49318
Country: PEOPLES REPUBLIC OF CHINA (PRC)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 102.858 minutes
Inclination: 97.4895 deg
SMA: 7271.961 km
Apoapsis: 904.145 km
Periapsis: 883.507 km
RAAN: 229.2642 deg
Eccentricy: 0.001419
Argument of periapsis: 69.1424 deg
Mean anomaly: 291.1263 deg
Mean motion: 13.99991659 rev/day
Mean motion (dot): 0.00000544 rev/day2
B* drag term: 0.00039084 1/REarth
Two-line elements (TLE)
Creation date: May 8, 2025, 3:01 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: May 7, 2025, 10:01 p.m. UTC
TLE line 0: 0 OBJECT D
TLE line 1: 1 49318U 21091D 25127.91741500 .00000544 00000-0 39084-3 0 9992
TLE line 2: 2 49318 97.4895 229.2642 0014190 69.1424 291.1263 13.99991659191373
Live tracking on map
Real-time ground track for satellite OBJECT D.
In-orbit conjunctions
There are no conjunctions computed for OBJECT D, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Xihe, also known as the Chinese Hα Solar Explorer (CHASE), is designed to test a newly developed satellite platform and conduct solar observations. The scientific payload of the satellite is an Hα imaging spectrograph (HIS), which can, for the first time, acquire full-disk spectroscopic solar observations in the Hα waveband. It will complement the observations by on-orbit solar spacecraft (such as SDO, IRIS, STEREO and PSP), as well as future solar missions of the Solar Orbiter and the Chinese Advanced Space-based Solar Observatory (ASO-S). Mission is named Xihe after a solar deity from Chinese mythology.
OBJECT D was lifted into orbit during the mission ‘Long March 2D | Xihe (CHASE)’, on board a Long March 2D space rocket.
The launch took place on Oct. 14, 2021, 10:51 a.m. from Launch Complex 9.
For more information about the launch, click the button.
Long March 2D | Xihe (CHASE)
Agency: N/A
Status: Launch Successful
Launch date: Oct. 14, 2021, 10:51 a.m. UTC
Rocket: Long March 2D
Launch pad: Launch Complex 9
Location: Taiyuan Satellite Launch Center, People's Republic of China
...
Latest news about this satellite
China launches hydrogen-alpha solar telescope aboard Long March 2D
China has launched a small experimental solar observatory as part of a multi-satellite launch aboard a Long March 2D rocket Thursday. The launch took place from the Taiyuan Satellite Launch Center at 10:51 UTC (18:51 Bejing time).
China launches orbiting solar observatory
China successfully launched a half-ton scientific research satellite Oct. 14 to study the violent and sudden physical processes behind solar flares, joining 10 other small payloads on a Long March 2D rocket that also tested grid fins to help guide the exp...
China launches first solar observatory, tests grid fins
China carried out its 37th orbital launch of the year Thursday, successfully sending the Chinese H-alpha Solar Explorer and 10 other satellites into orbit.
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