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

13732

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: 1987-098B

Object number (NORAD): 18586

Object ID (CCSDS): 18586

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 100.129 minutes

Inclination: 74.0068 deg

SMA: 7142.756 km

Apoapsis: 779.431 km

Periapsis: 749.81 km

RAAN: 279.6692 deg

Eccentricy: 0.0020735

Argument of periapsis: 358.5901 deg

Mean anomaly: 1.5191 deg

Mean motion: 14.38149542 rev/day

Mean motion (dot): 0.00000137 rev/day²

B* drag term: 0.000053863 1/R_Earth

Two-line elements (TLE)

Creation date: July 4, 2025, 6:39 p.m.

Reference frame: TEME

Reference center: EARTH

Epoch: July 4, 2025, 1:33 p.m. UTC

TLE line 0: 0 SL-8 R/B

TLE line 1: 1 18586U 87098B 25185.56508538 .00000137 00000-0 53863-4 0 9991

TLE line 2: 2 18586 74.0068 279.6692 0020735 358.5901 1.5191 14.38149542969297

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
NOAA 16 DEB	SSO	2025-04-22 07:46:33	0.0001208686	612.0 (m)	DEBRIS
CZ-6A DEB	SSO	2025-01-18 00:11:43	0.0002488867	102.0 (m)	DEBRIS
NOAA 16 DEB	SSO	2024-11-26 20:59:01	0.0001650863	183.0 (m)	DEBRIS
COSMOS 2491 DEB *	LEO	2024-08-18 22:05:07	0.0002786016	797.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2024-07-06 02:46:21	0.0001843713	942.0 (m)	DEBRIS

Associated space launch

Military communications satellite

SL-8 R/B was lifted into orbit during the mission ‘Kosmos-3M | Strela-2M 43’, on board a Kosmos-3M space rocket.

The launch took place on Dec. 1, 1987, 2:15 p.m. from 133/3 (133L).

For more information about the launch, click the button.

Kosmos-3M | Strela-2M 43

Agency: N/A

Status: Launch Successful

Launch date: Dec. 1, 1987, 2:15 p.m. UTC

Rocket: Kosmos-3M

Launch pad: 133/3 (133L)

Location: Plesetsk Cosmodrome, Russian Federation

...

Go to the launch

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