Key statistics
Satellite ATLAS H R/B at a glance.
Uptime
14039
Days in orbit
Revolutions
≈ 13.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
63.3
Latest
Satellite identification and parameters
Extended collection of information and parameters for ATLAS H R/B.
Object identification
Identified? True
Debris? False
Object name: ATLAS H R/B
International designator: 1987-043B
Object number (NORAD): 17998
Object ID (CCSDS): 17998
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 106.618 minutes
Inclination: 63.3148 deg
SMA: 7448.124 km
Apoapsis: 1603.314 km
Periapsis: 536.664 km
RAAN: 140.7095 deg
Eccentricy: 0.07160526
Argument of periapsis: 114.201 deg
Mean anomaly: 253.554 deg
Mean motion: 13.50617663 rev/day
Mean motion (dot): 0.00003459 rev/day2
B* drag term: 0.0010578794 1/REarth
Two-line elements (TLE)
Creation date: Oct. 21, 2025, 3:26 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 20, 2025, 10:22 p.m. UTC
TLE line 0: 0 ATLAS H R/B
TLE line 1: 1 17998U 87043B 25293.93250065 .00003459 00000-0 10579-2 0 9992
TLE line 2: 2 17998 63.3148 140.7095 0716053 114.2010 253.5540 13.50617663318934
Live tracking on map
Real-time ground track for satellite ATLAS H R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object ATLAS H R/B.
Associated space launch
The Parcae satellites were passive ELINT satellites. MSD satellites were dispensers of triplets of ocean surveillance satellites.
ATLAS H R/B 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
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