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

12683

Days in orbit

Revolutions

≈ 14.4

Per day

Orbit

LEO

Low Earth Orbit

Inclination

74.1

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: 1990-111B

Object number (NORAD): 21015

Object ID (CCSDS): 21015

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 100.2 minutes

Inclination: 74.0503 deg

SMA: 7146.156 km

Apoapsis: 784.131 km

Periapsis: 751.912 km

RAAN: 38.7082 deg

Eccentricy: 0.0022543

Argument of periapsis: 281.0169 deg

Mean anomaly: 78.8449 deg

Mean motion: 14.37123133 rev/day

Mean motion (dot): 0.00000468 rev/day²

B* drag term: 0.00016592217 1/R_Earth

Two-line elements (TLE)

Creation date: Aug. 31, 2025, 2:26 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Aug. 30, 2025, 8:46 p.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 21015U 90111B 25242.86571735 .00000468 00000-0 16592-3 0 9992

TLE line 2: 2 21015 74.0503 38.7082 0022543 281.0169 78.8449 14.37123133916094

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
CZ-6A DEB	SSO	2025-08-08 02:28:10	0.000643326	169.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2025-07-03 00:37:38	0.0001152377	247.0 (m)	DEBRIS
DMSP 5D-2 F13 DEB	SSO	2025-04-04 16:34:04	0.0001915256	824.0 (m)	DEBRIS
CZ-6A DEB	LEO	2024-12-26 04:23:40	0.000102879	835.0 (m)	DEBRIS
EOLE 1 (CAS-A)	LEO	2024-12-22 14:54:36	0.0002376353	824.0 (m)	PAYLOAD

Associated space launch

Military communications satellite

SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Strela-2M 48’, on board a Kosmos-3M space rocket.

The launch took place on Dec. 10, 1990, 7:54 a.m. from 133/3 (133L).

For more information about the launch, click the button.

Kosmos-3M | Strela-2M 48

Agency: N/A

Status: Launch Successful

Launch date: Dec. 10, 1990, 7:54 a.m. UTC

Rocket: Kosmos-3M

Launch pad: 133/3 (133L)

Location: Plesetsk Cosmodrome, Russian Federation

...

Go to the launch

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