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HJ-1A

In orbit NORAD 33320 CHCH-1433-2770-7025-0183 China

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2008

Launch

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satellite

Mission information
Spacecraft name
HJ-1A
Other names
Huan Jing-1A
Website
https://www.eoportal.org/satellite-missions/hj-1
Status
Active
The satellite is in orbit
The network has not received data from this satellite for a long time
Launch and timeline
Launch time
2008-09-06 00:00:00
Separation time
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
598.96 km
Apogee
627.29 km
Inclination
97.7°
Period
97.0 min
Semi-major axis
6991.3 km
Velocity
7.55 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-11 04:56:36 UTC
Two-line elements (TLE)
1 33320U 08041A   26283.93029204  .00000905  00000-0  11403-3 0  9990
2 33320  97.6819 265.3908 0020258 115.7810 244.5498 14.84198782975577
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Orbit history, past year

Mean elements of every TLE set over the past 365 days, plotted against the epoch of the set. Each source is its own line; click it in the legend to hide it. A jump in altitude is a manoeuvre or a bad set; lines drifting apart are a disagreement between sources. “TLE age” is how many hours have passed since the epoch of the source's freshest set, plotted against when the set reached us, on a logarithmic scale. A set the source repeats unchanged does not reset the age.

Prediction divergence

Each TLE set is propagated with SGP4 to the epoch of the next set from the same source and compared with it, plotted against the epoch of the next set; the tooltip shows how many hours ahead the prediction ran. The logarithmic scale shows the size of the divergence and the tooltip its sign: plus along-track means the prediction is ahead of the satellite. This is how well the sets agree, not the true error: the reference is a TLE too, off by about a kilometre. An outlier is a manoeuvre between sets. Sets more than a week apart are not compared.

Time of closest approach, UTC Object 1 Object 2 Distance, km Speed, km/s Max. probability
2026-10-12 01:35:46 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00044
NORAD 64505 		4.909 11.89 1.2e-07
2026-10-12 01:47:50 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00375
NORAD 68868 		3.857 14.54 1.2e-07
2026-10-12 17:26:11 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00144
NORAD 67133 		4.880 11.17 1.3e-07
2026-10-12 23:11:28 HUANJING 1A (HJ-1A)
NORAD 33320 		SL-14 R/B
NORAD 18422 		0.626 6.03 2.5e-05
2026-10-13 04:11:41 HUANJING 1A (HJ-1A)
NORAD 33320 		COSMOS 2251 DEB
NORAD 34115 		3.582 11.06 2.5e-07
2026-10-13 08:21:11 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00229
NORAD 68578 		4.863 13.19 1.1e-07
2026-10-14 01:54:22 HUANJING 1A (HJ-1A)
NORAD 33320 		CZ-6A DEB
NORAD 55237 		3.696 12.76 1.9e-07
2026-10-14 03:24:13 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00152
NORAD 65772 		4.583 13.12 1.2e-07
2026-10-14 03:46:37 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00059
NORAD 64519 		1.438 9.32 1.7e-06
2026-10-14 13:28:23 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00189
NORAD 68574 		1.999 12.99 6.4e-07
2026-10-14 15:14:27 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00505
NORAD 68886 		3.806 14.49 1.3e-07
2026-10-15 03:06:41 HUANJING 1A (HJ-1A)
NORAD 33320 		SL-14 R/B
NORAD 18959 		1.880 7.13 2.7e-06
2026-10-15 15:01:08 HUANJING 1A (HJ-1A)
NORAD 33320 		SL-14 R/B
NORAD 17912 		3.798 15.06 2.4e-07
2026-10-15 18:35:37 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00069
NORAD 64816 		4.694 12.78 1.2e-07
2026-10-15 22:37:31 HUANJING 1A (HJ-1A)
NORAD 33320 		THOR ABLESTAR DEB
NORAD 15783 		2.382 14.69 3.1e-07
2026-10-16 00:14:34 HUANJING 1A (HJ-1A)
NORAD 33320 		THOR ABLESTAR DEB
NORAD 15783 		4.452 14.68 9.0e-08
2026-10-16 01:03:43 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00269
NORAD 68587 		1.368 10.97 1.7e-06
2026-10-16 04:03:16 HUANJING 1A (HJ-1A)
NORAD 33320 		COSMOS 2251 DEB
NORAD 39110 		4.222 10.91 1.8e-07
2026-10-16 15:16:40 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00550
NORAD 69617 		2.019 10.62 8.1e-07
2026-10-16 16:15:09 HUANJING 1A (HJ-1A)
NORAD 33320 		LUDI TANCE 1-01A (L-SAR 01A)
NORAD 51284 		4.150 3.17 2.5e-07
2026-10-16 21:09:21 HUANJING 1A (HJ-1A)
NORAD 33320 		UNKNOWN
NORAD 85151 		3.780 11.09 2.2e-07
2026-10-16 23:30:37 HUANJING 1A (HJ-1A)
NORAD 33320 		GAOFEN-2
NORAD 40118 		4.183 9.86 2.0e-07
2026-10-17 12:41:28 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00480
NORAD 68876 		1.408 13.73 1.1e-06
2026-10-17 13:54:20 HUANJING 1A (HJ-1A)
NORAD 33320 		KUIPER-00145
NORAD 65767 		3.301 13.61 2.1e-07

Data: CelesTrak SOCRATES Plus, computed from TLEs of the public catalog. This is an estimate, not grounds for a manoeuvre: TLEs carry no covariance, and the maximum probability assumes a position error.

All conjunctions of this satellite