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

12567

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: 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: 100.204 minutes

Inclination: 74.0499 deg

SMA: 7146.338 km

Apoapsis: 783.38 km

Periapsis: 753.026 km

RAAN: 251.9362 deg

Eccentricy: 0.0021237

Argument of periapsis: 165.9664 deg

Mean anomaly: 194.2084 deg

Mean motion: 14.37068336 rev/day

Mean motion (dot): 0.00000407 rev/day²

B* drag term: 0.00014551 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, 7:42 p.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 21015U 90111B 25126.82114483 .00000407 00000-0 14551-3 0 9998

TLE line 2: 2 21015 74.0499 251.9362 0021237 165.9664 194.2084 14.37068336899425

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
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
CZ-6A DEB	SSO	2024-12-17 05:52:00	0.0001488184	769.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2024-09-10 16:53:06	0.000118734	463.0 (m)	DEBRIS

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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