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OPS 0757 (TACSAT), 3691

Orbit data source: Space-Track

OPS 0757 (TACSAT), 3691 is a payload satellite owned by SAMSO (US) in GEO that was launched on Sun, 09 Feb 1969 UTC via a TITAN IIIC launch vehicle from the Air Force Eastern Test Range (AFETR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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https://www.satcat.com/sats-embedded/3691?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

3691, 1969-013A

Orbit

GEO

Country

US

Related business

USAF Space and Missile Systems Organization (US)

Manufacturer

Hughes

Mission

Non-operational spacecraft

Bus & Motor

HS-308, Unknown motor

Mass

721 kg wet, ~650 kg dry

Launch date (UTC)

1969-02-09 (57 years ago)

Launch vehicle

TITAN IIIC

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 OPS 0757 (TACSAT)
1 03691U 69013A   25339.90559116 -.00000075  00000-0  00000-0 0  9999
2 03691   2.3583  75.7123 0023898 174.3325  40.7434  1.00446649112169

Epoch: 2025-12-05T21:44Z

TLE epoch observation values (Epoch: 2025-12-05T21:44:03.076Z)

Latitude

-1.38091°

Longitude

-110.01882°

Altitude

35,660.702 km

Speed

3.082 km/s

True Right ascension

19h 23m 44s

True Declination

-1° 22' 46"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

08:03:21

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,839.365 km

Perigee altitude

35,638.063 km

Semi-major axis

42,116.851 km

Eccentricity

0.00239

Inclination

2.3583°

RAAN

75.7123°

Arg. of periapsis

174.3325°

True anomaly

40.92254°

Mean anomaly

40.7434°

Eccentric anomaly

40.83293°

Mean motion

0.25111 °/min

Orbital period

1,433.65 mins

BSTAR

0

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Other satellites on launch #13 in the year 1969 (1969-02-09 UTC)

TITAN 3C TRANSTAGE DEB, 43512

TITAN 3C TRANSTAGE R/B, 3692

TITAN 3C TRANSTAGE DEB, 43282

TITAN 3C TRANSTAGE DEB, 43456

TITAN 3C TRANSTAGE DEB, 43283

TITAN 3C TRANSTAGE DEB, 43515

TITAN 3C TRANSTAGE DEB, 43449

TITAN 3C TRANSTAGE DEB, 43447

TITAN 3C TRANSTAGE DEB, 43514

TITAN 3C TRANSTAGE DEB, 43285

TITAN 3C TRANSTAGE DEB, 43448

TITAN 3C TRANSTAGE DEB, 43455

TITAN 3C TRANSTAGE DEB, 43454

TITAN 3C TRANSTAGE DEB, 43452

TITAN 3C TRANSTAGE DEB, 43516

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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OPS 0757 (TACSAT) Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
1440 mins	2025-12-06 10:02:02.698Z	187.952° SSW	2025-12-06 13:26:02.698Z	188.027° SSW	35.806°	2025-12-07 10:02:02.698Z	186.957° SSW

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3691 neighbors

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out OPS 0757 (TACSAT), 3691 on other resources

View OPS 0757 (TACSAT), 3691 on NASA - NSSDCA Website

View OPS 0757 (TACSAT), 3691 on Heavens-Above

View OPS 0757 (TACSAT), 3691 on Keep Track

View OPS 0757 (TACSAT), 3691 on Celestrak

View OPS 0757 (TACSAT), 3691 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

Documentation

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