Key statistics
Satellite USA 23 at a glance.
Uptime
13934
Days in orbit
Revolutions
≈ 13.8
Per day
Orbit
LEO
Low Earth Orbit
Inclination
63.3
Latest
Satellite identification and parameters
Extended collection of information and parameters for USA 23.
Object identification
Identified? True
Debris? False
Object name: USA 23
International designator: 1987-043E
Object number (NORAD): 18009
Object ID (CCSDS): 18009
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.364 minutes
Inclination: 63.2913 deg
SMA: 7342.789 km
Apoapsis: 1567.72 km
Periapsis: 361.587 km
RAAN: 237.7401 deg
Eccentricy: 0.0821304
Argument of periapsis: 98.5958 deg
Mean anomaly: 270.8927 deg
Mean motion: 13.79784409 rev/day
Mean motion (dot): 0.00006651 rev/day2
B* drag term: 0.00039024 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 8:17 p.m. UTC
TLE line 0: 0 USA 23
TLE line 1: 1 18009U 87043E 25188.84563609 .00006651 00000-0 39024-3 0 9994
TLE line 2: 2 18009 63.2913 237.7401 0821304 98.5958 270.8927 13.79784409297847
Live tracking on map
Real-time ground track for satellite USA 23.
In-orbit conjunctions
There are no conjunctions computed for USA 23, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
The Parcae satellites were passive ELINT satellites. MSD satellites were dispensers of triplets of ocean surveillance satellites.
USA 23 was lifted into orbit during the mission ‘Atlas H | Parcae 9A,B,C & MSD 9’, on board a Atlas H space rocket.
The launch took place on May 15, 1987, 3:45 p.m. from Space Launch Complex 3E.
For more information about the launch, click the button.
Atlas H | Parcae 9A,B,C & MSD 9
Agency: N/A
Status: Launch Successful
Launch date: May 15, 1987, 3:45 p.m. UTC
Rocket: Atlas H
Launch pad: Space Launch Complex 3E
Location: Vandenberg SFB, CA, USA
...
Latest news about this satellite
There are no fresh news available about this satellite. Check back as we update our databases every day.
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