OSCAR 31

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite OSCAR 31 at a glance.

Uptime

13468

Days in orbit

Revolutions

≈ 13.4

Per day

Orbit

SSO

Sun Synchronous Orbit

Inclination

90.0

Latest

Satellite identification and parameters

Extended collection of information and parameters for OSCAR 31.

Object identification

Identified? True

Debris? False

Object name: OSCAR 31

International designator: 1988-074B

Object number (NORAD): 19420

Object ID (CCSDS): 19420

Country: UNITED STATES OF AMERICA (US)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 107.258 minutes

Inclination: 90.0293 deg

SMA: 7477.911 km

Apoapsis: 1169.487 km

Periapsis: 1030.066 km

RAAN: 20.042 deg

Eccentricy: 0.0093222

Argument of periapsis: 326.5897 deg

Mean anomaly: 44.4594 deg

Mean motion: 13.42555657 rev/day

Mean motion (dot): 0.00000058 rev/day2

B* drag term: 0.000085052 1/REarth

Two-line elements (TLE)

Creation date: July 10, 2025, 3:09 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: July 9, 2025, 6:31 p.m. UTC

TLE line 0: 0 OSCAR 31

TLE line 1: 1 19420U 88074B 25190.77197731 .00000058 00000-0 85052-4 0 9999

TLE line 2: 2 19420 90.0293 20.0420 0093222 326.5897 44.4594 13.42555657805586

Live tracking on map

Real-time ground track for satellite OSCAR 31.

In-orbit conjunctions

There are no conjunctions computed for OSCAR 31, at the moment. Check back to stay up to date, as we update our databases every day.

Go to all conjunctions

Associated space launch

The Transit-O series of satellites that closely followed the design of Transit 5C-1 were also called “Oscars” (Oscar is the phonetic alphabet for “O”, i. e., operational). They were also called NNS (Navy Navigation Satellite) or shortened NavSat.

OSCAR 31 was lifted into orbit during the mission ‘Scout G-1 | Transit-O 25,31’, on board a Scout G-1 space rocket.

The launch took place on Aug. 25, 1988, 6:59 a.m. from Space Launch Complex 5.

For more information about the launch, click the button.

Launch to space Scout G-1 | Transit-O 25,31
Scout G-1 | Transit-O 25,31

Agency: N/A

Status: Launch Successful

Launch date: Aug. 25, 1988, 6:59 a.m. UTC

Rocket: Scout G-1

Launch pad: Space Launch Complex 5

Location: Vandenberg SFB, CA, USA

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Latest news about this satellite

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