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

7658

Days in orbit

Revolutions

≈ 2.1

Per day

Orbit

MEO

Medium Earth Orbit

Inclination

64.1

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: 2004-053E

Object number (NORAD): 28512

Object ID (CCSDS): 28512

Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 675.058 minutes

Inclination: 64.0996 deg

SMA: 25491.032 km

Apoapsis: 19176.456 km

Periapsis: 19049.339 km

RAAN: 66.1816 deg

Eccentricy: 0.00249338

Argument of periapsis: 232.6844 deg

Mean anomaly: 220.7471 deg

Mean motion: 2.13315113 rev/day

Mean motion (dot): -0.00000067 rev/day²

B* drag term: 0.0 1/R_Earth

Two-line elements (TLE)

Creation date: Dec. 14, 2025, 3:07 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Dec. 13, 2025, 12:34 p.m. UTC

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

TLE line 1: 1 28512U 04053E 25347.52417400 -.00000067 00000-0 00000-0 0 9998

TLE line 2: 2 28512 64.0996 66.1816 0024934 232.6844 220.7471 2.13315113163332

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
FREGAT R/B	MEO	2025-12-06 17:16:50	TBA	2884.0 (m)	ROCKET BODY
COSMOS 1989 (ETALON 1)	MEO	2025-10-16 09:19:15	TBA	4811.0 (m)	PAYLOAD
COSMOS 2317 (GLONASS)	MEO	2025-10-14 08:18:57	TBA	1378.0 (m)	PAYLOAD
COSMOS 2444 (GLONASS)	MEO	2025-05-01 12:36:58	TBA	3037.0 (m)	PAYLOAD

Associated space launch

GLONASS navigation satellites

SL-12 R/B(2) was lifted into orbit during the mission ‘Proton | Uragan 85, 86 & Uragan-M 3’, on board a Proton space rocket.

The launch took place on Dec. 26, 2004, 1:53 p.m. from 200/39 (200L).

For more information about the launch, click the button.

Proton | Uragan 85, 86 & Uragan-M 3

Agency: N/A

Status: Launch Successful

Launch date: Dec. 26, 2004, 1:53 p.m. UTC

Rocket: Proton

Launch pad: 200/39 (200L)

Location: Baikonur Cosmodrome, Republic of Kazakhstan

...

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