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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
116 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
APL
Mission
Spacecraft
Bus & Motor
TRANSIT 4, Unknown motor
Mass
78 kg wet, 78 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 hours ago
TLE from 5 hours ago
0 TRANSIT 4A
1 00116U 61015A 26037.59294613 .00000028 00000-0 80065-4 0 9991
2 00116 66.8075 210.3849 0075290 359.5977 0.5029 13.92305620278528Epoch: 2026-02-06T14:13Z
TLE epoch observation values (Epoch: 2026-02-06T14:13:50.545Z)
Latitude
-0.00004°
Longitude
-139.80432°
Altitude
867.684 km
Speed
7.447 km/s
True Right ascension
14h 01m 32s
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
21:00:41
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
973.893 km
Perigee altitude
864.014 km
Semi-major axis
7,297.09 km
Eccentricity
0.00753
Inclination
66.8075°
RAAN
210.3849°
Arg. of periapsis
359.5977°
True anomaly
0.51054°
Mean anomaly
0.5029°
Eccentric anomaly
0.50672°
Mean motion
3.48192 °/min
Orbital period
103.39 mins
BSTAR
0.000080065
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #15 in the year 1961 (1961-06-29 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-02-06 21:40:29.068Z | 346.275° N | 2026-02-06 21:45:29.068Z | 63.552° ENE | 36.04° | 2026-02-06 21:50:29.068Z | 125.724° SE |
| 9 mins | 2026-02-06 23:27:29.068Z | 300.818° NW | 2026-02-06 23:31:29.068Z | 248.39° W | 26.372° | 2026-02-06 23:36:29.068Z | 194.564° SSW |
| 10 mins | 2026-02-07 12:46:29.068Z | 195.231° SSW | 2026-02-07 12:50:29.068Z | 131.628° SE | 43.022° | 2026-02-07 12:56:29.068Z | 33.678° NE |
| 7 mins | 2026-02-07 14:34:29.068Z | 276.954° WNW | 2026-02-07 14:37:29.068Z | 314.016° NW | 20.038° | 2026-02-07 14:41:29.068Z | 0.268° 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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|