China Aerospace Science and Technology CorporationLong March 4BLaunch Complex 9, Taiyuan Satellite Launch Center, People's Republic of China
Huanjing 2A, 2B
Launched
September 27, 2020
Image: CASC
Summary
Huanjing 2A, 2B launched on a China Aerospace Science and Technology Corporation Long March 4B from Launch Complex 9, Taiyuan Satellite Launch Center, People's Republic of China on September 27, 2020. It was China Aerospace Science and Technology Corporation's 295th launch, 25th this year and humanity's 5,997th orbital launch attempt. It was the 40th Long March 4B flight and the 5th this year. The payload was bound for Sun-Synchronous Orbit (SSO). Huanjing Jianzai 02-01, one of 8 catalogued objects, reached a 607 × 662 km orbit inclined 98.0°. 8 objects from this launch are catalogued, 2 of them payloads.
- Booster
- No booster details on record.
- Mission
- Earth Science · Sun-Synchronous Orbit (SSO)
- Milestone
- 40th Long March 4B flight · 5th this yearChina Aerospace Science and Technology Corporation's 295th launch25th this yearhumanity's 5,997th orbital launch attempt75th orbital launch attempt this year
Flight preview
Orbit: as tracked
Huanjing Jianzai 02-01 · NORAD 46478 · 2020-067 · Space-Track · tracking 1 of 8 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 2020-067A
- Epoch
- 2020-09-27 08:07:19 UTC
- Mean motion
- 14.80623874 rev/day
- Eccentricity
- 0.0038809
- Inclination
- 97.9775°
- Ascending node
- 346.6195°
- Arg. of perigee
- 23.623°
- Mean anomaly
- 67.0799°
- Element set
- 999
- Rev at epoch
- 2
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: SSO. Ascent drawn from padside's representative profile.
Catalogued objects
8 catalogued: 2 payloads, 1 rocket stage, 5 components; 4 still in orbit
- Huanjing Jianzai 02-01 · NORAD 46478 · in orbit
- Huanjing Jianzai 02-02 · NORAD 46479 · in orbit
CZ-4B Y42 Stage 3 · re-entered March 4, 2025
Data from J. McDowell, planet4589.org
About this launch
Huanjing (abbreviated as HJ) is a constellation of environmental monitoring satellites. The HJ-2A and HJ-2B are 16-meter optical satellites which will provide 16-meter multispectral, 48-meter hyperspectral and infrared image data.
Pad

Launch Complex 9, Taiyuan Satellite Launch Center, People's Republic of China
48th launch from Launch Complex 9, 6th this year · 88th from Taiyuan Satellite Launch Center, People's Republic of China
80 launches from this pad · 162 from Taiyuan Satellite Launch Center, People's Republic of China
19 days after the previous launch from this pad
All launches from Taiyuan Satellite Launch Center, People's Republic of ChinaOpen in maps
Questions
When did Huanjing 2A, 2B launch?
Huanjing 2A, 2B launched on September 27, 2020. The time is known to the hour, not the minute.
Where can I watch Huanjing 2A, 2B?
Coverage: Long March-4B launches Huanjing-2A and Huanjing-2B. Watch the replay
What rocket launched Huanjing 2A, 2B?
Long March 4B, flown by China Aerospace Science and Technology Corporation. Long March 4B spec sheet
Where did Huanjing 2A, 2B launch from?
Launch Complex 9, Taiyuan Satellite Launch Center, People's Republic of China.
What orbit did Huanjing 2A, 2B reach?
Huanjing Jianzai 02-01, one of 8 catalogued objects, reached a 607 × 662 km orbit inclined 98.0°.
How many satellites did Huanjing 2A, 2B launch?
2 payloads from this launch are catalogued, 2 of them still in orbit (Data from J. McDowell, planet4589.org).
