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

16909

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: 1979-078B

Object number (NORAD): 11511

Object ID (CCSDS): 11511

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 100.124 minutes

Inclination: 74.0366 deg

SMA: 7142.529 km

Apoapsis: 776.025 km

Periapsis: 752.762 km

RAAN: 13.5768 deg

Eccentricy: 0.0016285

Argument of periapsis: 223.9311 deg

Mean anomaly: 136.0549 deg

Mean motion: 14.38218133 rev/day

Mean motion (dot): 0.00000389 rev/day²

B* drag term: 0.00013664196 1/R_Earth

Two-line elements (TLE)

Creation date: Dec. 12, 2025, 10:14 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Dec. 12, 2025, 7:37 a.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 11511U 79078B 25346.31752275 .00000389 00000-0 13664-3 0 9995

TLE line 2: 2 11511 74.0366 13.5768 0016285 223.9311 136.0549 14.38218133423685

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
FENGYUN 1C DEB	SSO	2025-12-04 23:56:27	0.0001456193	282.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2025-05-10 15:48:37	0.0001055338	805.0 (m)	DEBRIS
VANGUARD DEB	MEO	2025-01-20 09:43:33	0.0002580764	351.0 (m)	DEBRIS
NOAA 16 DEB	SSO	2025-01-19 20:50:24	0.0001005719	254.0 (m)	DEBRIS
CZ-4 DEB	SSO	2024-10-06 17:42:36	0.0001592007	679.0 (m)	DEBRIS

Associated space launch

Early warning satellite

SL-8 R/B was lifted into orbit during the mission ‘Molniya-M | US-K 12’, on board a Molniya-M space rocket.

The launch took place on Aug. 28, 1979, 12:17 a.m. from 43/4 (43R).

For more information about the launch, click the button.

Molniya-M | US-K 12

Agency: N/A

Status: Launch Successful

Launch date: Aug. 28, 1979, 12:17 a.m. UTC

Rocket: Molniya-M

Launch pad: 43/4 (43R)

Location: Plesetsk Cosmodrome, Russian Federation

...

Go to the launch

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