OPS 7869 (DMSP 4B F1)

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite OPS 7869 (DMSP 4B F1) at a glance.

Uptime

20971

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: 101.707 minutes

Inclination: 98.5637 deg

SMA: 7217.64 km

Apoapsis: 876.612 km

Periapsis: 802.398 km

RAAN: 129.075 deg

Eccentricy: 0.00514121

Argument of periapsis: 270.3281 deg

Mean anomaly: 89.2003 deg

Mean motion: 14.15826198 rev/day

Mean motion (dot): 0.00000151 rev/day2

B* drag term: 0.000096963343 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, 9:37 p.m. UTC

TLE line 0: 0 OPS 7869 (DMSP 4B F1)

TLE line 1: 1 03266U 68042A 25293.90111042 .00000151 00000-0 96963-4 0 9990

TLE line 2: 2 03266 98.5637 129.0750 0051412 270.3281 89.2003 14.15826198879277

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.

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Associated 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.

Launch to space Thor Burner 2 | DSAP-4B F1
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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Latest news about this satellite

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