Showing default

OV1-4, 2121

Orbit data source: Space-Track

OV1-4, 2121 is a payload satellite owned by USAF OAR (US) in LEO that was launched on Wed, 30 Mar 1966 UTC via an ATLAS D launch vehicle from the Air Force Western Test Range (AFWTR). 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/2121?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/2121?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

2121, 1966-025A

Orbit

LEO

Last TLE update

14 hours ago

Origin

US Air Force Office of Aerospace Research (US)

Manufacturer

GD/Convair

Mission

Defense Science

Bus & Motor

OV1, Unknown motor

Mass

87 kg wet, 87 kg dry

Launch date (UTC)

1966-03-30 (59 years ago)

Launch vehicle

ATLAS D

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Domed Cyl, 1.4 m

Radar Cross Section

0.946 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 14 hours ago

0 OV1-4
1  2121U 66025A   25129.48959245  .00000405  00000-0  11110-3 0  9996
2  2121 144.5019 134.4635 0083150   3.4448 356.6805 13.87256458995474

Epoch: 2025-05-09T11:45Z

Definitive object data (Epoch: 2025-05-09T11:45:00.787Z)

Latitude

-0.00001°

Longitude

90.66524°

Altitude

876.563 km

Speed

7.447 km/s

True Right ascension

08h 57m 51s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

21.19033°

Longitude

60.8673°

Altitude

884.565 km

Speed

7.44 km/s

Apparent Right ascension

03h 53m 26s

Apparent Declination

-17° 03' 30"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

09:57:06

Azimuth

257.315° W

Elevation

-11.537°

Doppler factor

Orbital elements

Apogee altitude

1,002.103 km

Perigee altitude

880.381 km

Semi-major axis

7,319.379 km

Eccentricity

0.008315

Inclination

144.5019°

RAAN

134.4635°

Arg. of periapsis

3.4448°

True anomaly

356.62475°

Mean anomaly

356.6805°

Eccentric anomaly

356.65268°

Mean motion

3.46603 °/min

BSTAR

0.0001111

Orbital period

103.87 mins

Loading maneuver chart data...

Loading SW <> Apogee altitude chart data...

Loading historical data...

Other satellites on launch #25 in the year 1966 (1966-03-30 UTC)

OV1-5, 2122

OV1-5 R/B, 2123

OV1-4 R/B, 2124

OV1-5 DEB, 3611 (Decayed)

OV1-5 DEB, 5361

OV1-5 DEB, 5599

OV1-5 DEB, 27880 (Decayed)

OV1-4 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.
8 mins	2025-05-10 15:55:06.382Z	103.762° ESE	2025-05-10 15:59:06.382Z	152.638° SSE	23.75°	2025-05-10 16:03:06.382Z	204.626° SW
9 mins	2025-05-10 17:34:06.382Z	102.217° ESE	2025-05-10 17:38:06.382Z	180.083° SSW	36.322°	2025-05-10 17:43:06.382Z	241.223° WSW
9 mins	2025-05-10 19:12:06.382Z	106.805° ESE	2025-05-10 19:16:06.382Z	184.905° SSW	40.38°	2025-05-10 19:21:06.382Z	258.957° W
8 mins	2025-05-10 20:51:06.382Z	133.185° SE	2025-05-10 20:54:06.382Z	186.266° SSW	34.613°	2025-05-10 20:59:06.382Z	263.746° W
6 mins	2025-05-10 22:30:06.382Z	167.886° S	2025-05-10 22:33:06.382Z	208.888° SW	20.15°	2025-05-10 22:36:06.382Z	247.652° W

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 ascending order

Check out OV1-4, 2121 on other resources

View OV1-4, 2121 on NASA - NSSDCA Website

View OV1-4, 2121 on Heavens-Above

View OV1-4, 2121 on Keep Track

View OV1-4, 2121 on Celestrak

View OV1-4, 2121 on Gunter's Space Page

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