Showing default

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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/202?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

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

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

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: 13 hours ago

TLE from 13 hours ago

0 TRANSIT 4B
1 00202U 61031A   26044.00620322  .00000070  00000-0  58328-4 0  9993
2 00202  32.4367 264.3063 0101006 351.2139   8.6717 13.63780339204038

Epoch: 2026-02-13T00:08Z

TLE epoch observation values (Epoch: 2026-02-13T00:08:55.958Z)

Latitude

0.00002°

Longitude

119.02337°

Altitude

946.868 km

Speed

7.417 km/s

True Right ascension

17h 37m 13s

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

15:41:59

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,100.155 km

Perigee altitude

950.595 km

Semi-major axis

7,403.512 km

Eccentricity

0.0101

Inclination

32.4367°

RAAN

264.3063°

Arg. of periapsis

351.2139°

True anomaly

8.84841°

Mean anomaly

8.6717°

Eccentric anomaly

8.75984°

Mean motion

3.40711 °/min

Orbital period

105.66 mins

BSTAR

0.000058328

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

TRAAC DEB, 10796

THOR ABLESTAR R/B, 204

TRAAC, 205

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.

Click here to try in Sandbox

TRANSIT 4B Visibility forecast

Loading observer location...
Set 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	2026-02-13 17:55:08.057Z	207.476° SW	2026-02-13 18:00:08.057Z	156.011° SSE	22.353°	2026-02-13 18:05:08.057Z	106.008° ESE
10 mins	2026-02-13 19:47:08.057Z	233.263° WSW	2026-02-13 19:52:08.057Z	160.803° S	33.491°	2026-02-13 19:57:08.057Z	106.736° ESE
10 mins	2026-02-13 21:39:08.057Z	247.808° W	2026-02-13 21:43:08.057Z	195.294° SSW	33.751°	2026-02-13 21:49:08.057Z	122.725° SE
9 mins	2026-02-13 23:31:08.057Z	246.074° WSW	2026-02-13 23:35:08.057Z	202.914° SW	23.024°	2026-02-13 23:40:08.057Z	154.031° SSE

Items per page:

1–4 of 4 items

of 1 page

Co-orbital & Co-planar RSOs

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

Please sign-in to view Co-orbital & Co-planar RSOs.

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

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: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-02-13T00:08:55.958Z)

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: 13 hours ago