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

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Identifier

116, 1961-015A

Orbit

LEO

Country

Related business

United States Navy (US)

Manufacturer

APL

Mission

Spacecraft

Bus & Motor

TRANSIT 4, Unknown motor

Mass

78 kg wet, 78 kg dry

Launch date (UTC)

1961-06-29 (65 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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 6 hours ago

TLE from 6 hours ago

0 TRANSIT 4A
1   116U 61015A   26052.46240579  .00000040  00000-0  89235-4 0  9998
2   116  66.8095 174.0023 0076520 349.2169  10.7266 13.92308951280592

Epoch: 2026-02-21T11:05Z

TLE epoch observation values (Epoch: 2026-02-21T11:05:51.860Z)

Latitude

-0.00001°

Longitude

-143.84843°

Altitude

867.764 km

Speed

7.447 km/s

True Right ascension

11h 36m 00s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

20:13:07

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

974.779 km

Perigee altitude

863.104 km

Semi-major axis

7,297.079 km

Eccentricity

0.00765

Inclination

66.8095°

RAAN

174.0023°

Arg. of periapsis

349.2169°

True anomaly

10.89135°

Mean anomaly

10.7266°

Eccentric anomaly

10.80882°

Mean motion

3.48193 °/min

Orbital period

103.39 mins

BSTAR

0.000089235

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

THOR ABLESTAR DEB, 149 (Decayed)

THOR ABLESTAR DEB, 547 (Decayed)

THOR ABLESTAR DEB, 176 (Decayed)

THOR ABLESTAR DEB, 146 (Decayed)

THOR ABLESTAR DEB, 17711 (Decayed)

THOR ABLESTAR DEB, 220 (Decayed)

THOR ABLESTAR DEB, 556 (Decayed)

THOR ABLESTAR DEB, 5784 (Decayed)

THOR ABLESTAR DEB, 17653 (Decayed)

THOR ABLESTAR DEB, 651 (Decayed)

THOR ABLESTAR DEB, 18890 (Decayed)

THOR ABLESTAR DEB, 1500 (Decayed)

THOR ABLESTAR DEB, 17649 (Decayed)

THOR ABLESTAR DEB, 472 (Decayed)

THOR ABLESTAR DEB, 1501 (Decayed)

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TRANSIT 4A 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.
11 mins	2026-02-21 18:32:04.180Z	338.144° N	2026-02-21 18:38:04.180Z	70.266° E	41.124°	2026-02-21 18:43:04.180Z	136.023° SSE
8 mins	2026-02-21 20:20:04.180Z	295.014° NW	2026-02-21 20:24:04.180Z	248.75° W	20.674°	2026-02-21 20:28:04.180Z	207.96° SW
10 mins	2026-02-22 09:39:04.180Z	208.581° SW	2026-02-22 09:43:04.180Z	250.454° W	44.969°	2026-02-22 09:49:04.180Z	28.786° NE
6 mins	2026-02-22 11:28:04.180Z	292.478° WNW	2026-02-22 11:30:04.180Z	315.63° NNW	16.465°	2026-02-22 11:34:04.180Z	358.345° N
6 mins	2026-02-22 16:57:04.180Z	15.416° NNE	2026-02-22 16:59:04.180Z	37.923° NE	17.367°	2026-02-22 17:03:04.180Z	80.131° E

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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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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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

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

TRANSIT 4A, 116

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-02-21T11:05:51.860Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

TRANSIT 4A Visibility forecast

Co-orbital & Co-planar RSOs

Check out TRANSIT 4A, 116 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago