SL-12 R/B(2)

Satellite information

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Satellite Type and Status

ROCKET BODYIN ORBIT

Key statistics

Satellite SL-12 R/B(2) at a glance.

Uptime

17949

Days in orbit

Revolutions

≈ 1.0

Per day

Orbit

GEO

Geostationary Orbit

Inclination

4.1

Latest

Satellite identification and parameters

Extended collection of information and parameters for SL-12 R/B(2).

Object identification

Identified? True

Debris? False

Object name: SL-12 R/B(2)

International designator: 1976-092F

Object number (NORAD): 17872

Object ID (CCSDS): 17872

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 1436.181 minutes

Inclination: 4.0524 deg

SMA: 42166.374 km

Apoapsis: 35854.051 km

Periapsis: 35722.426 km

RAAN: 273.5824 deg

Eccentricy: 0.00156079

Argument of periapsis: 196.1484 deg

Mean anomaly: 254.7654 deg

Mean motion: 1.00265929 rev/day

Mean motion (dot): -0.00000277 rev/day²

B* drag term: 0.0 1/R_Earth

Two-line elements (TLE)

Creation date: Nov. 1, 2025, 7:40 p.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Nov. 1, 2025, 3:05 p.m. UTC

TLE line 0: 0 SL-12 R/B(2)

TLE line 1: 1 17872U 76092F 25305.62887976 -.00000277 00000-0 00000-0 0 9994

TLE line 2: 2 17872 4.0524 273.5824 0015608 196.1484 254.7654 1.00265929116641

Live tracking on map

Real-time ground track for satellite SL-12 R/B(2).

In-orbit conjunctions

A list of the most updated potential collisions computed for object SL-12 R/B(2).

Target	Orbit	TCA	Probability of collision	Miss distance	Type
RADUGA 2	GEO	2025-05-29 15:58:30	TBA	2993.0 (m)	PAYLOAD
COSMOS 1961	OTHER	2025-03-11 07:44:13	TBA	3147.0 (m)	PAYLOAD

Associated space launch

Geostationary communications satellite for military and governmental puposes

SL-12 R/B(2) was lifted into orbit during the mission ‘Proton-K/DM | Raduga 2’, on board a Proton-K/DM space rocket.

The launch took place on Sept. 11, 1976, 6:24 p.m. from 81/24 (81P).

For more information about the launch, click the button.

Proton-K/DM | Raduga 2

Agency: N/A

Status: Launch Successful

Launch date: Sept. 11, 1976, 6:24 p.m. UTC

Rocket: Proton-K/DM

Launch pad: 81/24 (81P)

Location: Baikonur Cosmodrome, Republic of Kazakhstan

...

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