WEOS

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite WEOS at a glance.

Uptime

8240

Days in orbit

Revolutions

≈ 14.3

Per day

Orbit

SSO

Sun Synchronous Orbit

Inclination

98.8

Latest

Satellite identification and parameters

Extended collection of information and parameters for WEOS.

Object identification

Identified? True

Debris? False

Object name: WEOS

International designator: 2002-056C

Object number (NORAD): 27599

Object ID (CCSDS): 27599

Country: JAPAN (JPN)

Current information (Y/N): Y

RCS size: MEDIUM

Orbital parameters

Period: 100.654 minutes

Inclination: 98.7649 deg

SMA: 7167.704 km

Apoapsis: 795.719 km

Periapsis: 783.418 km

RAAN: 145.7488 deg

Eccentricy: 0.0008581

Argument of periapsis: 243.6219 deg

Mean anomaly: 116.4082 deg

Mean motion: 14.30647647 rev/day

Mean motion (dot): 0.00000127 rev/day2

B* drag term: 0.000066006 1/REarth

Two-line elements (TLE)

Creation date: July 5, 2025, 10:56 p.m.

Reference frame: TEME

Reference center: EARTH

Epoch: July 5, 2025, 8:10 p.m. UTC

TLE line 0: 0 WEOS

TLE line 1: 1 27599U 02056C 25186.84091094 .00000127 00000-0 66006-4 0 9994

TLE line 2: 2 27599 98.7649 145.7488 0008581 243.6219 116.4082 14.30647647176832

Live tracking on map

Real-time ground track for satellite WEOS.

In-orbit conjunctions

A list of the most updated potential collisions computed for object WEOS.

Target Orbit TCA Probability of collision Miss distance Type
FENGYUN 1C DEB SSO 2025-04-15 04:26:23 0.0003877345 273.0 (m) DEBRIS
SCOUT A DEB SSO 2025-03-03 17:12:05 0.001306435 514.0 (m) DEBRIS
NOAA 16 DEB SSO 2024-11-25 00:58:11 0.0003712804 814.0 (m) DEBRIS
NOAA 17 DEB SSO 2024-11-08 05:35:11 0.000239232 717.0 (m) DEBRIS
CZ-6A DEB LEO 2024-10-01 13:30:41 0.0008325229 515.0 (m) DEBRIS

Associated space launch

Midori II has been engaged in various observation missions to understand the realities and causes of global environmental changes, such as abnormal weather conditions and the expansion of the ozone hole.

WEOS was lifted into orbit during the mission ‘H-IIA 202 | Midori-2’, on board a H-IIA space rocket.

The launch took place on Dec. 14, 2002, 1:31 a.m. from Yoshinobu Launch Complex LP-1.

For more information about the launch, click the button.

Launch to space H-IIA 202 | Midori-2
H-IIA 202 | Midori-2

Agency: N/A

Status: Launch Successful

Launch date: Dec. 14, 2002, 1:31 a.m. UTC

Rocket: H-IIA

Launch pad: Yoshinobu Launch Complex LP-1

Location: Tanegashima Space Center, Japan

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Latest news about this satellite

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