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COSMOS 2499

In orbit NORAD 39765 GAUY-7904-6906-4815-9917 Russia

Observations 8
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2014

Launch

8

Observations all time

Mission information
Spacecraft name
COSMOS 2499
Other names
RS-47
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
2014-05-23 00:00:00
Separation time
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
1147.94 km
Apogee
1506.26 km
Inclination
82.5°
Period
112.2 min
Semi-major axis
7705.2 km
Velocity
7.15 km/s
Orbital elements
TLE source
Space-Track.org
TLE updated
2026-10-08 08:46:42 UTC
Two-line elements (TLE)
1 39765U 14028E   26280.89382036  .00000018  00000-0  19581-4 0  9999
2 39765  82.4529 176.3924 0232518  96.9307 265.8304 12.82905491579470
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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
2026-10-14 01:27:42 ONEWEB-0037
NORAD 45440 		COSMOS 2499 (RS47)
NORAD 39765 		4.965 14.48 2.0e-07
2026-10-14 05:12:25 ONEWEB-0051
NORAD 45155 		COSMOS 2499 (RS47)
NORAD 39765 		2.542 14.48 7.6e-07
2026-10-14 07:04:43 ONEWEB-0045
NORAD 45151 		COSMOS 2499 (RS47)
NORAD 39765 		4.218 14.48 2.8e-07
2026-10-14 10:49:26 ONEWEB-0395
NORAD 50475 		COSMOS 2499 (RS47)
NORAD 39765 		3.112 14.48 5.1e-07
2026-10-14 17:31:21 COSMOS 2451
NORAD 35498 		COSMOS 2499 (RS47)
NORAD 39765 		3.493 13.64 1.5e-07
2026-10-16 19:19:57 HULIANWANG DIGUI-02
NORAD 62324 		COSMOS 2499 (RS47)
NORAD 39765 		0.155 13.30 9.4e-05
2026-10-17 00:41:15 HULIANWANG DIGUI-85
NORAD 65820 		COSMOS 2499 (RS47)
NORAD 39765 		4.714 14.46 7.2e-08

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