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: 14 hours ago
TLE from 14 hours ago
0 SECOR 1B
1 00729U 64001C 26274.64073220 -.00000023 00000-0 22615-4 0 9990
2 00729 69.9001 64.4548 0016567 296.1773 63.7627 13.95234849191556Epoch: 2026-10-01T15:22Z
TLE epoch observation values (Epoch: 2026-10-01T15:22:39.262Z)
Latitude
-0.00004°
Longitude
-176.58293°
Altitude
907.325 km
Speed
7.401 km/s
True Right ascension
04h 17m 49s
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
23:30:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
920.469 km
Perigee altitude
896.325 km
Semi-major axis
7,286.534 km
Eccentricity
0.00166
Inclination
69.9001°
RAAN
64.4548°
Arg. of periapsis
296.1773°
True anomaly
63.93314°
Mean anomaly
63.7627°
Eccentric anomaly
63.8479°
Mean motion
3.48949 °/min
Orbital period
103.17 mins
BSTAR
0.000022615
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-10-02 10:24:42.118Z | 155.743° SSE | 2026-10-02 10:29:42.118Z | 97.285° ESE | 25.785° | 2026-10-02 10:33:42.118Z | 52.072° ENE |
| 9 mins | 2026-10-02 12:10:42.118Z | 233.939° WSW | 2026-10-02 12:14:42.118Z | 299.704° NW | 47.461° | 2026-10-02 12:19:42.118Z | 11.019° NNE |
| 7 mins | 2026-10-02 19:27:42.118Z | 14.436° NNE | 2026-10-02 19:30:42.118Z | 48.123° ENE | 18.325° | 2026-10-02 19:34:42.118Z | 90.113° ESE |
| 10 mins | 2026-10-02 21:12:42.118Z | 332.294° NNW | 2026-10-02 21:16:42.118Z | 297.618° NW | 75.674° | 2026-10-02 21:22:42.118Z | 161.69° S |
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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