Key statistics
Satellite OPS 7869 (DMSP 4B F1) at a glance.
Uptime
20922
Days in orbit
Revolutions
≈ 14.2
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
98.6
Latest
Satellite identification and parameters
Extended collection of information and parameters for OPS 7869 (DMSP 4B F1).
Object identification
Identified? True
Debris? False
Object name: OPS 7869 (DMSP 4B F1)
International designator: 1968-042A
Object number (NORAD): 3266
Object ID (CCSDS): 3266
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 101.709 minutes
Inclination: 98.5691 deg
SMA: 7217.694 km
Apoapsis: 878.116 km
Periapsis: 801.003 km
RAAN: 82.5191 deg
Eccentricy: 0.00534198
Argument of periapsis: 50.0968 deg
Mean anomaly: 310.4885 deg
Mean motion: 14.15810142 rev/day
Mean motion (dot): 0.00000173 rev/day2
B* drag term: 0.00010773571 1/REarth
Two-line elements (TLE)
Creation date: Sept. 2, 2025, 11:42 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 2, 2025, 11:48 a.m. UTC
TLE line 0: 0 OPS 7869 (DMSP 4B F1)
TLE line 1: 1 03266U 68042A 25245.49208883 .00000173 00000-0 10774-3 0 9990
TLE line 2: 2 03266 98.5691 82.5191 0053420 50.0968 310.4885 14.15810142872424
Live tracking on map
Real-time ground track for satellite OPS 7869 (DMSP 4B F1).
In-orbit conjunctions
There are no conjunctions computed for OPS 7869 (DMSP 4B F1), at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
DSAP-4B (Defense Satellite Application Program Block 4B) was the sixth version of the military meteorological satellites of the Defense Meteorological Satellite Program.
OPS 7869 (DMSP 4B F1) was lifted into orbit during the mission ‘Thor Burner 2 | DSAP-4B F1’, on board a Thor Burner 2 space rocket.
The launch took place on May 23, 1968, 4:38 a.m. from Space Launch Complex 10W.
For more information about the launch, click the button.
Thor Burner 2 | DSAP-4B F1
Agency: N/A
Status: Launch Successful
Launch date: May 23, 1968, 4:38 a.m. UTC
Rocket: Thor Burner 2
Launch pad: Space Launch Complex 10W
Location: Vandenberg SFB, CA, USA
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