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

12891

Days in orbit

Revolutions

≈ 14.9

Per day

Orbit

LEO

Low Earth Orbit

Inclination

82.9

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: 1990-078B

Object number (NORAD): 20775

Object ID (CCSDS): 20775

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 96.911 minutes

Inclination: 82.9054 deg

SMA: 6988.912 km

Apoapsis: 871.004 km

Periapsis: 350.549 km

RAAN: 329.9213 deg

Eccentricy: 0.03723438

Argument of periapsis: 308.2065 deg

Mean anomaly: 48.6158 deg

Mean motion: 14.85896078 rev/day

Mean motion (dot): 0.00027514 rev/day²

B* drag term: 0.00085138515 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, 1:23 a.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 20775U 90078B 25346.05772389 .00027514 00000-0 85139-3 0 9994

TLE line 2: 2 20775 82.9054 329.9213 0372344 308.2065 48.6158 14.85896078796276

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	2025-09-15 01:17:49	0.0001243434	469.0 (m)	DEBRIS
CZ-4 DEB	SSO	2025-02-21 14:58:04	0.0001313204	480.0 (m)	DEBRIS
THOR AGENA D R/B	SSO	2024-08-22 20:38:15	0.0001958788	141.0 (m)	ROCKET BODY
DELTA 1 DEB	SSO	2024-08-16 02:30:58	0.0001610469	271.0 (m)	DEBRIS

Associated space launch

Early warning satellite

SL-8 R/B was lifted into orbit during the mission ‘Molniya 8K78M-PVB | US-K 66’, on board a Molniya 8K78M-PVB space rocket.

The launch took place on Aug. 28, 1990, 7:49 a.m. from 43/4 (43R).

For more information about the launch, click the button.

Molniya 8K78M-PVB | US-K 66

Agency: N/A

Status: Launch Successful

Launch date: Aug. 28, 1990, 7:49 a.m. UTC

Rocket: Molniya 8K78M-PVB

Launch pad: 43/4 (43R)

Location: Plesetsk Cosmodrome, Russian Federation

...

Go to the launch

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