OSCAR 18 (WEBERSAT)

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite OSCAR 18 (WEBERSAT) at a glance.

Uptime

13109

Days in orbit

Revolutions

≈ 14.3

Per day

Orbit

SSO

Sun Synchronous Orbit

Inclination

98.9

Latest

Satellite identification and parameters

Extended collection of information and parameters for OSCAR 18 (WEBERSAT).

Object identification

Identified? True

Debris? False

Object name: OSCAR 18 (WEBERSAT)

International designator: 1990-005F

Object number (NORAD): 20441

Object ID (CCSDS): 20441

Country: UNITED STATES OF AMERICA (US)

Current information (Y/N): Y

RCS size: MEDIUM

Orbital parameters

Period: 100.424 minutes

Inclination: 98.8902 deg

SMA: 7156.798 km

Apoapsis: 787.254 km

Periapsis: 770.072 km

RAAN: 4.4497 deg

Eccentricy: 0.0012004

Argument of periapsis: 53.4407 deg

Mean anomaly: 359.9303 deg

Mean motion: 14.3391913 rev/day

Mean motion (dot): 0.0000025 rev/day²

B* drag term: 0.00010652 1/R_Earth

Two-line elements (TLE)

Creation date: Dec. 12, 2025, 7:16 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Dec. 12, 2025, 12:22 a.m. UTC

TLE line 0: 0 OSCAR 18 (WEBERSAT)

TLE line 1: 1 20441U 90005F 25346.01581461 .00000250 00000-0 10652-3 0 9995

TLE line 2: 2 20441 98.8902 4.4497 0012004 53.4407 359.9303 14.33919130875238

Live tracking on map

Real-time ground track for satellite OSCAR 18 (WEBERSAT).

In-orbit conjunctions

A list of the most updated potential collisions computed for object OSCAR 18 (WEBERSAT).

Target	Orbit	TCA	Probability of collision	Miss distance	Type
DMSP 5D-3 F19 DEB	SSO	2025-09-07 10:12:12	0.000133919	690.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2025-07-17 11:22:54	0.0001941624	330.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2025-04-26 10:32:09	0.0003556794	242.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2025-04-23 13:58:29	0.001562683	263.0 (m)	DEBRIS
PEGASUS DEB	LEO	2025-04-12 13:18:30	0.0001914167	106.0 (m)	DEBRIS

Associated space launch

French Earth observation satellite

OSCAR 18 (WEBERSAT) was lifted into orbit during the mission ‘Ariane 40 | SPOT 2’, on board a Ariane 40 space rocket.

The launch took place on Jan. 22, 1990, 1:35 a.m. from Ariane Launch Area 2.

For more information about the launch, click the button.

Ariane 40 | SPOT 2

Agency: N/A

Status: Launch Successful

Launch date: Jan. 22, 1990, 1:35 a.m. UTC

Rocket: Ariane 40

Launch pad: Ariane Launch Area 2

Location: Guiana Space Centre, French Guiana

...

Go to the launch

Latest news about this satellite

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