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

17311

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: 1977-119B

Object number (NORAD): 10521

Object ID (CCSDS): 10521

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 99.85 minutes

Inclination: 74.0265 deg

SMA: 7129.516 km

Apoapsis: 765.917 km

Periapsis: 736.846 km

RAAN: 329.3618 deg

Eccentricy: 0.0020388

Argument of periapsis: 357.0971 deg

Mean anomaly: 3.0063 deg

Mean motion: 14.42157342 rev/day

Mean motion (dot): 0.00000375 rev/day²

B* drag term: 0.0001219 1/R_Earth

Two-line elements (TLE)

Creation date: May 9, 2025, 2:46 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: May 8, 2025, 5:45 p.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 10521U 77119B 25128.74017027 .00000375 00000-0 12190-3 0 9991

TLE line 2: 2 10521 74.0265 329.3618 0020388 357.0971 3.0063 14.42157342487150

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
COSMOS 1275 DEB	LEO	2025-03-17 19:11:08	0.000212475	803.0 (m)	DEBRIS
CZ-6A DEB	LEO	2025-02-25 10:25:07	0.0006831616	764.0 (m)	DEBRIS
CZ-6A DEB	SSO	2025-01-12 19:12:54	0.0005864128	132.0 (m)	DEBRIS
IRIDIUM 33 DEB	LEO	2024-09-12 18:49:14	0.002920549	92.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2024-06-24 07:52:26	0.0005717689	280.0 (m)	DEBRIS

Associated space launch

Military communications satellite

SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Strela-2M 16’, on board a Kosmos-3M space rocket.

The launch took place on Dec. 16, 1977, 4:25 a.m. from 132/1 (132L).

For more information about the launch, click the button.

Kosmos-3M | Strela-2M 16

Agency: N/A

Status: Launch Successful

Launch date: Dec. 16, 1977, 4:25 a.m. UTC

Rocket: Kosmos-3M

Launch pad: 132/1 (132L)

Location: Plesetsk Cosmodrome, Russian Federation

...

Go to the launch

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