SL-16 R/B

Satellite information

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Satellite Type and Status

ROCKET BODYIN ORBIT

Key statistics

Satellite SL-16 R/B at a glance.

Uptime

14036

Days in orbit

Revolutions

≈ 14.2

Per day

Orbit

LEO

Low Earth Orbit

Inclination

71.0

Latest

Satellite identification and parameters

Extended collection of information and parameters for SL-16 R/B.

Object identification

Identified? True

Debris? False

Object name: SL-16 R/B

International designator: 1987-041B

Object number (NORAD): 17974

Object ID (CCSDS): 17974

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 101.579 minutes

Inclination: 71.0096 deg

SMA: 7211.577 km

Apoapsis: 841.895 km

Periapsis: 824.99 km

RAAN: 338.0819 deg

Eccentricy: 0.00117206

Argument of periapsis: 60.9893 deg

Mean anomaly: 119.9378 deg

Mean motion: 14.17611989 rev/day

Mean motion (dot): -0.0000004 rev/day²

B* drag term: 0.00000379031 1/R_Earth

Two-line elements (TLE)

Creation date: Oct. 16, 2025, 2:37 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Oct. 15, 2025, 9:40 p.m. UTC

TLE line 0: 0 SL-16 R/B

TLE line 1: 1 17974U 87041B 25288.90286022 -.00000040 00000-0 37903-5 0 9994

TLE line 2: 2 17974 71.0096 338.0819 0011721 60.9893 119.9378 14.17611989987562

Live tracking on map

Real-time ground track for satellite SL-16 R/B.

In-orbit conjunctions

A list of the most updated potential collisions computed for object SL-16 R/B.

Target	Orbit	TCA	Probability of collision	Miss distance	Type
THORAD AGENA D DEB	SSO	2025-10-04 21:45:50	0.00122256	101.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2025-08-08 22:33:48	0.002484227	45.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2025-01-06 19:27:38	0.004406191	49.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2024-10-29 02:23:07	0.0001650424	342.0 (m)	DEBRIS
NOAA 16 DEB	SSO	2024-10-14 20:10:48	0.0001426608	713.0 (m)	DEBRIS

Associated space launch

Second generation ELING satellite

SL-16 R/B was lifted into orbit during the mission ‘Zenit-2 | Tselina-2 4’, on board a Zenit-2 space rocket.

The launch took place on May 13, 1987, 5:40 a.m. from 45/1.

For more information about the launch, click the button.

Zenit-2 | Tselina-2 4

Agency: N/A

Status: Launch Successful

Launch date: May 13, 1987, 5:40 a.m. UTC

Rocket: Zenit-2

Launch pad: 45/1

Location: Baikonur Cosmodrome, Republic of Kazakhstan

...

Go to the launch

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