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: 17 hours ago
TLE from 17 hours ago
0 SECOR 1B
1 00729U 64001C 26127.10044778 -.00000007 00000-0 34451-4 0 9997
2 00729 69.9028 20.9594 0012094 138.7545 221.4475 13.95222030170978Epoch: 2026-05-07T02:24Z
TLE epoch observation values (Epoch: 2026-05-07T02:24:38.688Z)
Latitude
-0.00005°
Longitude
119.84675°
Altitude
919.305 km
Speed
7.389 km/s
True Right ascension
01h 23m 50s
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
03:22:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
917.254 km
Perigee altitude
899.629 km
Semi-major axis
7,286.578 km
Eccentricity
0.00121
Inclination
69.9028°
RAAN
20.9594°
Arg. of periapsis
138.7545°
True anomaly
221.35587°
Mean anomaly
221.4475°
Eccentric anomaly
221.40167°
Mean motion
3.48946 °/min
Orbital period
103.17 mins
BSTAR
0.000034451
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-05-07 19:47:44.183Z | 262.158° W | 2026-05-07 19:51:44.183Z | 308.018° NW | 20.917° | 2026-05-07 19:55:44.183Z | 354.774° N |
| 9 mins | 2026-05-08 03:03:44.183Z | 358.258° N | 2026-05-08 03:07:44.183Z | 56.372° ENE | 30.879° | 2026-05-08 03:12:44.183Z | 121.541° SE |
| 8 mins | 2026-05-08 04:49:44.183Z | 307.408° NW | 2026-05-08 04:53:44.183Z | 247.249° WSW | 28.751° | 2026-05-08 04:57:44.183Z | 197.132° SSW |
| 10 mins | 2026-05-08 18:06:44.183Z | 200.25° SSW | 2026-05-08 18:11:44.183Z | 46.842° ENE | 44.361° | 2026-05-08 18:16:44.183Z | 25.92° NE |
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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