NAVSTAR 70 (USA 251), 39741
Orbit data source: Space-Track
NAVSTAR 70 (USA 251), 39741 is a payload satellite owned by USAF SMC (US) in MEO that was launched on Sat, 17 May 2014 UTC via a DELTA 4M+(4,2) 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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39741 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Boeing/ES
Mission
Operational Defense Navigation
Bus & Motor
GPS IIF, AOCS
Mass
1,630 kg wet, ~1,500 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 9.0 m
Radar Cross Section
13.960 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 NAVSTAR 70 (USA 251)
1 39741U 14026A 25307.10563304 -.00000051 00000-0 00000-0 0 9993
2 39741 56.5977 340.3190 0037847 317.0884 42.6794 2.00563999 84002Epoch: 2025-11-03T02:32Z
TLE epoch observation values (Epoch: 2025-11-03T02:32:06.694Z)
Latitude
0.00002°
Longitude
-100.30397°
Altitude
20,108.916 km
Speed
3.885 km/s
True Right ascension
22h 41m 20s
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
23:21:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
20,282.64 km
Perigee altitude
20,081.594 km
Semi-major axis
26,560.254 km
Eccentricity
0.00378
Inclination
56.5977°
RAAN
340.319°
Arg. of periapsis
317.0884°
True anomaly
42.97442°
Mean anomaly
42.6794°
Eccentric anomaly
42.82681°
Mean motion
0.50141 °/min
Orbital period
717.97 mins
BSTAR
0
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Other satellites on launch #26 in the year 2014 (2014-05-17 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.NAVSTAR 70 (USA 251) 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. |
|---|---|---|---|---|---|---|---|
| 208 mins | 2025-11-05 03:23:56.830Z | 154.921° SSE | 2025-11-05 03:55:56.830Z | 103.262° ESE | 44.309° | 2025-11-05 06:51:56.830Z | 61.076° ENE |
| 126 mins | 2025-11-06 01:17:56.830Z | 178.161° S | 2025-11-06 03:23:56.830Z | 151.472° SSE | 43.295° | 2025-11-06 03:23:56.830Z | 151.472° SSE |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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