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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 URL

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

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ISO8601 Format

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

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 3 hours ago

TLE from 3 hours ago

0 TRANSIT 4A
1   116U 61015A   26189.51861610 -.00000007  00000-0  53392-4 0  9999
2   116  66.8073 198.6309 0082264 259.0250 100.1567 13.92335202299674

Epoch: 2026-07-08T12:26Z

TLE epoch observation values (Epoch: 2026-07-08T12:26:48.431Z)

Latitude

-0.00002°

Longitude

85.45536°

Altitude

933.603 km

Speed

7.38 km/s

True Right ascension

13h 14m 31s

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

03:40:01

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

978.878 km

Perigee altitude

858.822 km

Semi-major axis

7,296.987 km

Eccentricity

0.00823

Inclination

66.8073°

RAAN

198.6309°

Arg. of periapsis

259.025°

True anomaly

101.08288°

Mean anomaly

100.1567°

Eccentric anomaly

100.61996°

Mean motion

3.48199 °/min

Orbital period

103.39 mins

BSTAR

0.000053392

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

THOR ABLESTAR DEB, 4015 (Decayed)

THOR ABLESTAR DEB, 324

THOR ABLESTAR DEB, 417

THOR ABLESTAR DEB *, 18651

THOR ABLESTAR DEB, 300 (Decayed)

THOR ABLESTAR DEB, 48810

THOR ABLESTAR DEB, 322 (Decayed)

THOR ABLESTAR DEB, 551 (Decayed)

THOR ABLESTAR DEB, 414

THOR ABLESTAR DEB, 126

THOR ABLESTAR DEB, 474 (Decayed)

THOR ABLESTAR DEB, 260

THOR ABLESTAR DEB, 420

THOR ABLESTAR DEB, 418 (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.
5 mins	2026-07-09 00:39:05.251Z	127.735° SE	2026-07-09 00:42:05.251Z	97.659° ESE	13.822°	2026-07-09 00:44:05.251Z	77.885° E
11 mins	2026-07-09 02:22:05.251Z	208.872° SW	2026-07-09 02:27:05.251Z	262.892° W	44.948°	2026-07-09 02:33:05.251Z	28.438° NE
6 mins	2026-07-09 04:12:05.251Z	292.257° WNW	2026-07-09 04:14:05.251Z	314.614° NW	17.718°	2026-07-09 04:18:05.251Z	356.873° N
6 mins	2026-07-09 09:41:05.251Z	12.11° NNE	2026-07-09 09:44:05.251Z	46.093° ENE	17.678°	2026-07-09 09:47:05.251Z	77.854° E
10 mins	2026-07-09 11:26:05.251Z	331.563° NNW	2026-07-09 11:31:05.251Z	131.268° SE	44.924°	2026-07-09 11:36:05.251Z	151.91° SSE
4 mins	2026-07-09 13:15:05.251Z	271.752° WNW	2026-07-09 13:16:05.251Z	261.448° W	13.196°	2026-07-09 13:19:05.251Z	231.674° WSW

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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: 3 hours ago

TLE from 3 hours ago

TLE epoch observation values (Epoch: 2026-07-08T12:26:48.431Z)

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: 3 hours ago