Key statistics
Satellite OPS 7869 (DMSP 4B F1) at a glance.
Uptime
21024
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: 101.706 minutes
Inclination: 98.5587 deg
SMA: 7217.567 km
Apoapsis: 878.006 km
Periapsis: 800.859 km
RAAN: 180.6335 deg
Eccentricy: 0.00534437
Argument of periapsis: 115.602 deg
Mean anomaly: 245.0691 deg
Mean motion: 14.15847592 rev/day
Mean motion (dot): 0.00000122 rev/day2
B* drag term: 0.000082080583 1/REarth
Two-line elements (TLE)
Creation date: Dec. 14, 2025, 3:07 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 13, 2025, 12:56 p.m. UTC
TLE line 0: 0 OPS 7869 (DMSP 4B F1)
TLE line 1: 1 03266U 68042A 25347.53943923 .00000122 00000-0 82081-4 0 9994
TLE line 2: 2 03266 98.5587 180.6335 0053444 115.6020 245.0691 14.15847592886861
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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