TRANSIT 4A, 116
Orbit data source: Space-Track
TRANSIT 4A, 116 is a payload satellite owned by USN BuWeps (US) in LEO that was launched on Thu, 29 Jun 1961 UTC via a THOR ABLESTAR 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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116 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
APL
Mission
Defense Navigation
Bus & Motor
TRANSIT 4, Unknown motor
Mass
78 kg wet, 78 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.5 m
Radar Cross Section
1.143 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 16 hours ago
TLE from 16 hours ago
0 TRANSIT 4A
1 00116U 61015A 25257.48735783 .00000048 00000-0 95489-4 0 9998
2 00116 66.8091 205.4113 0068641 108.3274 252.5288 13.92259410258324Epoch: 2025-09-14T11:41Z
TLE epoch observation values (Epoch: 2025-09-14T11:41:47.716Z)
Latitude
-0.00004°
Longitude
36.25681°
Altitude
938.157 km
Speed
7.375 km/s
True Right ascension
13h 41m 38s
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
20:28:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
969.204 km
Perigee altitude
869.026 km
Semi-major axis
7,297.252 km
Eccentricity
0.00686
Inclination
66.8091°
RAAN
205.4113°
Arg. of periapsis
108.3274°
True anomaly
251.78047°
Mean anomaly
252.5288°
Eccentric anomaly
252.15444°
Mean motion
3.4818 °/min
Orbital period
103.39 mins
BSTAR
0.000095489
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Other satellites on launch #15 in the year 1961 (1961-06-29 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.TRANSIT 4A 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2025-09-15 05:27:50.702Z | 9.927° NNE | 2025-09-15 05:30:50.702Z | 41.861° NE | 13.399° | 2025-09-15 05:32:50.702Z | 63.302° ENE |
| 9 mins | 2025-09-15 07:13:50.702Z | 338.024° N | 2025-09-15 07:17:50.702Z | 51.115° ENE | 43.406° | 2025-09-15 07:22:50.702Z | 142.558° SSE |
| 5 mins | 2025-09-15 09:01:50.702Z | 276.514° WNW | 2025-09-15 09:03:50.702Z | 252.771° W | 15.648° | 2025-09-15 09:06:50.702Z | 220.875° SW |
| 5 mins | 2025-09-15 20:35:50.702Z | 128.4° SE | 2025-09-15 20:37:50.702Z | 106.1° ESE | 15.572° | 2025-09-15 20:40:50.702Z | 73.195° E |
| 10 mins | 2025-09-15 22:18:50.702Z | 216.259° SW | 2025-09-15 22:23:50.702Z | 316.839° NNW | 43.76° | 2025-09-15 22:28:50.702Z | 24.763° NE |
| 4 mins | 2025-09-16 00:09:50.702Z | 307.469° NW | 2025-09-16 00:10:50.702Z | 318.753° NNW | 14.073° | 2025-09-16 00:13:50.702Z | 350.703° N |
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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