SECOR 1B, 729
Orbit data source: Space-Track
SECOR 1B, 729 is an American payload satellite in LEO that was launched on Sat, 11 Jan 1964 UTC via a THOR SLV-2A AGENA D launch vehicle from the Air Force Western Test Range (AFWTR). 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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Identifier
Orbit
Country
USRelated business
Manufacturer
ITT
Mission
Spacecraft
Bus & Motor
SECOR, Unknown motor
Mass
18 kg wet, 18 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
BOX, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 SECOR 1B
1 729U 64001C 26307.54678022 -.00000014 00000-0 29144-4 0 9991
2 729 69.9024 353.8674 0016982 260.9233 98.9950 13.95237806196142Epoch: 2026-11-03T13:07Z
TLE epoch observation values (Epoch: 2026-11-03T13:07:21.811Z)
Latitude
-0.00005°
Longitude
114.21862°
Altitude
914.593 km
Speed
7.394 km/s
True Right ascension
23h 35m 28s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
17:45:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
920.76 km
Perigee altitude
896.012 km
Semi-major axis
7,286.523 km
Eccentricity
0.0017
Inclination
69.9024°
RAAN
353.8674°
Arg. of periapsis
260.9233°
True anomaly
99.18714°
Mean anomaly
98.995°
Eccentric anomaly
99.09108°
Mean motion
3.4895 °/min
Orbital period
103.17 mins
BSTAR
0.000029144
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Other satellites on launch #1 in the year 1964 (1964-01-11 UTC)
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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.SECOR 1B 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-11-04 03:02:04.844Z | 116.936° SE | 2026-11-04 03:04:04.844Z | 96.75° ESE | 12.541° | 2026-11-04 03:06:04.844Z | 76.723° E |
| 10 mins | 2026-11-04 04:44:04.844Z | 204.004° SW | 2026-11-04 04:49:04.844Z | 8.64° NNE | 82.911° | 2026-11-04 04:54:04.844Z | 24.074° NE |
| 6 mins | 2026-11-04 06:33:04.844Z | 288.099° WNW | 2026-11-04 06:35:04.844Z | 309.932° NW | 16.116° | 2026-11-04 06:39:04.844Z | 351.26° N |
| 10 mins | 2026-11-04 13:47:04.844Z | 349.524° N | 2026-11-04 13:51:04.844Z | 53.456° ENE | 54.46° | 2026-11-04 13:57:04.844Z | 138.581° SSE |
| 7 mins | 2026-11-04 15:33:04.844Z | 299.155° NW | 2026-11-04 15:36:04.844Z | 264.598° W | 22.132° | 2026-11-04 15:40:04.844Z | 216.46° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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