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
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 5 days ago
TLE from 5 days ago
0 SECOR 1B
1 729U 64001C 26154.62995929 -.00000004 00000-0 36605-4 0 9997
2 729 69.9012 321.9030 0011346 96.1507 264.0890 13.95224846174812Epoch: 2026-06-03T15:07Z
TLE epoch observation values (Epoch: 2026-06-03T15:07:08.482Z)
Latitude
-0.00008°
Longitude
-156.9682°
Altitude
913.544 km
Speed
7.395 km/s
True Right ascension
21h 27m 36s
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
03:28:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
916.699 km
Perigee altitude
900.164 km
Semi-major axis
7,286.569 km
Eccentricity
0.00113
Inclination
69.9012°
RAAN
321.903°
Arg. of periapsis
96.1507°
True anomaly
263.95969°
Mean anomaly
264.089°
Eccentric anomaly
264.02435°
Mean motion
3.48946 °/min
Orbital period
103.17 mins
BSTAR
0.000036605
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-06-08 19:32:39.709Z | 11.653° NNE | 2026-06-08 19:35:39.709Z | 43.053° NE | 15.331° | 2026-06-08 19:38:39.709Z | 76.18° E |
| 10 mins | 2026-06-08 21:17:39.709Z | 335.542° NNW | 2026-06-08 21:22:39.709Z | 152.007° SSE | 44.907° | 2026-06-08 21:27:39.709Z | 156.876° SSE |
| 8 mins | 2026-06-09 10:36:39.709Z | 156.857° SSE | 2026-06-09 10:40:39.709Z | 101.409° ESE | 27.468° | 2026-06-09 10:44:39.709Z | 50.105° ENE |
| 9 mins | 2026-06-09 12:21:39.709Z | 239.341° WSW | 2026-06-09 12:25:39.709Z | 293.238° NW | 32.065° | 2026-06-09 12:30:39.709Z | 6.408° NNE |
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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