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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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<iframe src="https://www.satcat.com/sats-embedded/116?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/116?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

116, 1961-015A

Orbit

LEO

Last TLE update

18 hours ago

Origin

United States Navy (US)

Manufacturer

APL

Mission

Defense Navigation

Bus & Motor

TRANSIT 4, Unknown motor

Mass

78 kg wet, 78 kg dry

Launch date (UTC)

1961-06-29 (64 years ago)

Launch vehicle

THOR ABLESTAR

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 0.5 m

Radar Cross Section

1.143 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 18 hours ago

0 TRANSIT 4A
1 00116U 61015A   25198.50986394  .00000017  00000-0  71864-4 0  9998
2 00116  66.8110 349.7036 0071939 152.5809 207.9096 13.92247498250114

Epoch: 2025-07-17T12:14Z

TLE epoch observation values (Epoch: 2025-07-17T12:14:12.244Z)

Latitude

-0.00005°

Longitude

-129.42208°

Altitude

969.331 km

Speed

7.344 km/s

True Right ascension

23h 18m 48s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

-36.59177°

Longitude

67.15825°

Altitude

913.888 km

Speed

7.404 km/s

Apparent Right ascension

10h 07m 05s

Apparent Declination

-44° 53' 01"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

19:16:22

Azimuth

246.686° WSW

Elevation

-58.466°

Doppler factor

Orbital elements

Apogee altitude

971.652 km

Perigee altitude

866.66 km

Semi-major axis

7,297.293 km

Eccentricity

0.00719

Inclination

66.811°

RAAN

349.7036°

Arg. of periapsis

152.5809°

True anomaly

207.52678°

Mean anomaly

207.9096°

Eccentric anomaly

207.71789°

Mean motion

3.48177 °/min

Orbital period

103.4 mins

BSTAR

0.000071864

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Other satellites on launch #15 in the year 1961 (1961-06-29 UTC)

THOR ABLESTAR DEB, 140 (Decayed)

THOR ABLESTAR DEB, 141

THOR ABLESTAR DEB, 142 (Decayed)

THOR ABLESTAR DEB, 143 (Decayed)

THOR ABLESTAR DEB, 144

THOR ABLESTAR DEB, 145

THOR ABLESTAR DEB, 146 (Decayed)

THOR ABLESTAR DEB, 147

THOR ABLESTAR DEB, 148

THOR ABLESTAR DEB, 149 (Decayed)

THOR ABLESTAR DEB, 150

THOR ABLESTAR DEB, 151 (Decayed)

THOR ABLESTAR DEB, 152

THOR ABLESTAR DEB, 153 (Decayed)

TRANSIT 4A Visibility forecast

Observer location: undefined°, undefined°

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	2025-07-18 10:45:33.001Z	168.803° S	2025-07-18 10:50:33.001Z	108.346° ESE	28.955°	2025-07-18 10:55:33.001Z	48.896° ENE
9 mins	2025-07-18 12:32:33.001Z	244.778° WSW	2025-07-18 12:36:33.001Z	302.719° NW	33.19°	2025-07-18 12:41:33.001Z	12.527° NNE
8 mins	2025-07-18 19:49:33.001Z	356.992° N	2025-07-18 19:53:33.001Z	56.899° ENE	28.182°	2025-07-18 19:57:33.001Z	109.203° ESE
9 mins	2025-07-18 21:35:33.001Z	310.01° NW	2025-07-18 21:39:33.001Z	250.434° W	32.377°	2025-07-18 21:44:33.001Z	183.505° SSW

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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Check out TRANSIT 4A, 116 on other resources

View TRANSIT 4A, 116 on NASA - NSSDCA Website

View TRANSIT 4A, 116 on Heavens-Above

View TRANSIT 4A, 116 on Keep Track

View TRANSIT 4A, 116 on Celestrak

View TRANSIT 4A, 116 on Gunter's Space Page

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