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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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Iframe URL

https://www.satcat.com/sats-embedded/202?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

202, 1961-031A

Orbit

LEO

Country

Related business

United States Navy (US)

Manufacturer

APL

Mission

Spacecraft

Bus & Motor

TRANSIT 4, Unknown motor

Mass

89 kg wet, 89 kg dry

Launch date (UTC)

1961-11-15 (64 years ago)

Launch vehicle

THOR ABLESTAR

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 TRANSIT 4B
1 00202U 61031A   26048.61871565  .00000035  00000-0  17273-4 0  9996
2 00202  32.4357 241.2020 0100816  26.2701 334.2989 13.63780452204660

Epoch: 2026-02-17T14:50Z

TLE epoch observation values (Epoch: 2026-02-17T14:50:57.032Z)

Latitude

-0°

Longitude

-129.13176°

Altitude

953.658 km

Speed

7.41 km/s

True Right ascension

16h 04m 48s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

01:48:55

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,100.014 km

Perigee altitude

950.735 km

Semi-major axis

7,403.511 km

Eccentricity

0.01008

Inclination

32.4357°

RAAN

241.202°

Arg. of periapsis

26.2701°

True anomaly

333.79214°

Mean anomaly

334.2989°

Eccentric anomaly

334.0461°

Mean motion

3.40711 °/min

Orbital period

105.66 mins

BSTAR

0.000017273

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Other satellites on launch #31 in the year 1961 (1961-11-15 UTC)

TRAAC DEB, 10796

THOR ABLESTAR R/B, 204

TRAAC, 205

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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.
8 mins	2026-02-18 15:38:41.173Z	196.642° SSW	2026-02-18 15:42:41.173Z	155.102° SSE	19.056°	2026-02-18 15:46:41.173Z	113.293° SE
10 mins	2026-02-18 17:29:41.173Z	229.019° WSW	2026-02-18 17:33:41.173Z	179.515° S	31.622°	2026-02-18 17:39:41.173Z	104.978° ESE
10 mins	2026-02-18 19:21:41.173Z	246.011° WSW	2026-02-18 19:25:41.173Z	190.2° SSW	34.057°	2026-02-18 19:31:41.173Z	118.044° SE
9 mins	2026-02-18 21:13:41.173Z	245.829° WSW	2026-02-18 21:17:41.173Z	198.23° SSW	24.693°	2026-02-18 21:22:41.173Z	147.519° SSE

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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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

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Check out TRANSIT 4B, 202 on other resources

View TRANSIT 4B, 202 on NASA - NSSDCA Website

View TRANSIT 4B, 202 on Heavens-Above

View TRANSIT 4B, 202 on Keep Track

View TRANSIT 4B, 202 on Celestrak

View TRANSIT 4B, 202 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

TRANSIT 4B, 202

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-02-17T14:50:57.032Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #31 in the year 1961 (1961-11-15 UTC)

TRANSIT 4B Visibility forecast

Co-orbital & Co-planar RSOs

Check out TRANSIT 4B, 202 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago