- SHIYAN 21 (SY-21)
- NORAD 54752
- 2022-172A
- Low Earth orbit
Current orbit
View on live mapOrbit began over the Mediterranean Sea
Orbit ends over Morocco
Sunlit since
Enters the Earth’s shadow
In view from you
Nobody watches Shiyan 21 go over, but a receiver still asks whether it is above the horizon. Say where you are and this card answers.
Your position is rounded to about a kilometre and sent only to the Orbinauts API, to find the pass.
No brightness has been published for Shiyan 21, so it is not a naked-eye satellite and no city page carries pass times for it. Nothing here estimates one.
Seeing it
There is nothing to go outside for: it is too faint to see with the naked eye from anywhere on Earth.
Timeline
- Launch
Launched, on the day GCAT records. Source
Summary
Over the Pacific Ocean LIVE
Where is Shiyan 21?
At 5:35:16 PM UTC Shiyan 21 was over the Pacific Ocean (27.1° S, 108.8° W), 495 km up, moving at 7.61 km/s and in sunlight.
What is Shiyan 21?
A satellite in low Earth orbit, in space since Dec 16, 2022.
Can I see Shiyan 21?
No, not with the naked eye: no brightness has been published for Shiyan 21, and nothing here estimates one.
General
- Operator
- Chinese Academy of Space Technology, Beijing (CASC 5th Acad)
- State
- China, People's Republic of
- Built by
- Chinese Academy of Space Technology, Beijing (CASC 5th Acad)
- Launched
- Mass
- 100 kg
- Operating
- Yes
- Orbit class
- Low Earth orbit
From GCAT, Jonathan McDowell’s general catalogue, licensed CC BY 4.0: the operator, the state, the manufacturer, the launch day, the mass, and whether it is operating. The orbit class is read from its current elements.
Latest orbital data
- Position received
- 5:35 PM UTC
- Station time (UTC)
- 5:35 PM UTC
- Latitude / longitude
- 27.1° S, 108.8° W
- Altitude
- 495 km
- Speed
- 7.61 km/s (27,410 km/h)
- Course
- north-east
- Light
- In sunlight until 6:09 PM UTC
- Inclination
- 36°
- Orbital period
- 94.2 minutes
- Orbits per day
- 15.28
- This orbit
- 467 to 500 km
- In shadow
- 36 minutes of each orbit
- In view from
- Within 1,550 km of the point below it
- Elements epoch
- Nov 3, 2026, 9:47 PM, 4 days old
- Source
- Position from Space-Track orbital elements of Nov 3, 2026, 9:47 PM, 4 days old.
No operator publishes an ephemeris for Shiyan 21, so every position here comes from its orbital elements.
In orbit
- Close approaches
- No close approach to Shiyan 21 has been reported publicly in the past thirty days.
From Space-Track’s public conjunction messages; the latest report was issued Nov 8, 2026, 1:11 PM, 3 hours old. Only approaches serious enough to be reported publicly are listed: within three days and, for two bodies near the Earth, closer than a kilometre with a chance of a collision above 1 in 10,000, the level at which NASA moves the ISS.
Data and API
The current elements from Space-Track as an OMM object, epoch Nov 3, 2026, 9:47 PM, 4 days old.
{
"OBJECT_NAME": "SHIYAN 21 (SY-21)",
"OBJECT_ID": "2022-172A",
"EPOCH": "2026-11-03T21:47:29.215392",
"MEAN_MOTION": 15.28344992,
"ECCENTRICITY": 0.00240482,
"INCLINATION": 35.9927,
"RA_OF_ASC_NODE": 277.7102,
"ARG_OF_PERICENTER": 27.6265,
"MEAN_ANOMALY": 332.5742,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 54752,
"ELEMENT_SET_NO": 999,
"REV_AT_EPOCH": 21706,
"BSTAR": 0.00020573744,
"MEAN_MOTION_DOT": 0.00005799,
"MEAN_MOTION_DDOT": 0
}