SL-8 R/B

Satellite information

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Satellite Type and Status

ROCKET BODYIN ORBIT

Key statistics

Satellite SL-8 R/B at a glance.

Uptime

17477

Days in orbit

Revolutions

≈ 14.4

Per day

Orbit

LEO

Low Earth Orbit

Inclination

74.0

Latest

Satellite identification and parameters

Extended collection of information and parameters for SL-8 R/B.

Object identification

Identified? True

Debris? False

Object name: SL-8 R/B

International designator: 1977-059B

Object number (NORAD): 10121

Object ID (CCSDS): 10121

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 100.198 minutes

Inclination: 74.0464 deg

SMA: 7146.042 km

Apoapsis: 781.735 km

Periapsis: 754.078 km

RAAN: 245.8768 deg

Eccentricy: 0.0019351

Argument of periapsis: 247.619 deg

Mean anomaly: 112.2914 deg

Mean motion: 14.37157811 rev/day

Mean motion (dot): 0.00000357 rev/day²

B* drag term: 0.00012855 1/R_Earth

Two-line elements (TLE)

Creation date: May 7, 2025, 3:14 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: May 6, 2025, 6:29 p.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 10121U 77059B 25126.77059194 .00000357 00000-0 12855-3 0 9990

TLE line 2: 2 10121 74.0464 245.8768 0019351 247.6190 112.2914 14.37157811503107

Live tracking on map

Real-time ground track for satellite SL-8 R/B.

In-orbit conjunctions

A list of the most updated potential collisions computed for object SL-8 R/B.

Target	Orbit	TCA	Probability of collision	Miss distance	Type
SCOUT X-1 DEB	LEO	2025-02-13 09:23:50	0.0001449994	29.0 (m)	DEBRIS
NOAA 16 DEB	SSO	2024-11-09 13:39:57	0.0001036795	564.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2024-08-29 03:09:16	0.0001064203	890.0 (m)	DEBRIS
SL-14 DEB	LEO	2024-07-04 15:59:03	0.0002441375	687.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2024-07-01 04:31:35	0.0001149323	1000.0 (m)	DEBRIS

Associated space launch

Military communications satellite

SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Strela-2M 15’, on board a Kosmos-3M space rocket.

The launch took place on July 1, 1977, 11:52 a.m. from 132/1 (132L).

For more information about the launch, click the button.

Kosmos-3M | Strela-2M 15

Agency: N/A

Status: Launch Successful

Launch date: July 1, 1977, 11:52 a.m. UTC

Rocket: Kosmos-3M

Launch pad: 132/1 (132L)

Location: Plesetsk Cosmodrome, Russian Federation

...

Go to the launch

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