TRANSIT 4B, 202
Orbit data source: Space-Track
TRANSIT 4B, 202 is a payload satellite owned by USN BuWeps (US) in LEO that was launched on Wed, 15 Nov 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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202 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
89 kg wet, 89 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.5 m
Radar Cross Section
1.143 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 17 hours ago
TLE from 17 hours ago
0 TRANSIT 4B
1 00202U 61031A 25261.18949231 .00000065 00000-0 51459-4 0 9997
2 00202 32.4377 284.6785 0101162 308.6859 50.4750 13.63759512183849Epoch: 2025-09-18T04:32Z
TLE epoch observation values (Epoch: 2025-09-18T04:32:52.135Z)
Latitude
0.00003°
Longitude
-140.89334°
Altitude
973.623 km
Speed
7.39 km/s
True Right ascension
18h 58m 42s
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
14:23:37
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,100.346 km
Perigee altitude
950.554 km
Semi-major axis
7,403.587 km
Eccentricity
0.01012
Inclination
32.4377°
RAAN
284.6785°
Arg. of periapsis
308.6859°
True anomaly
51.37638°
Mean anomaly
50.475°
Eccentric anomaly
50.92497°
Mean motion
3.40706 °/min
Orbital period
105.66 mins
BSTAR
0.000051459
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Other satellites on launch #31 in the year 1961 (1961-11-15 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 4B 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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-09-19 05:22:53.326Z | 213.294° SW | 2025-09-19 05:27:53.326Z | 155.022° SSE | 27.058° | 2025-09-19 05:32:53.326Z | 104.605° ESE |
| 12 mins | 2025-09-19 07:13:53.326Z | 242.859° WSW | 2025-09-19 07:18:53.326Z | 185.863° SSW | 35.38° | 2025-09-19 07:25:53.326Z | 106.427° ESE |
| 11 mins | 2025-09-19 09:05:53.326Z | 253.966° W | 2025-09-19 09:10:53.326Z | 198.193° SSW | 32.379° | 2025-09-19 09:16:53.326Z | 129.635° SE |
| 8 mins | 2025-09-19 10:58:53.326Z | 244.63° WSW | 2025-09-19 11:02:53.326Z | 205.909° SW | 19.435° | 2025-09-19 11:06:53.326Z | 168.184° S |
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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