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USA 72, 21775

Orbit data source: Space-Track

USA 72, 21775 is an American payload satellite in HEO that was launched on Fri, 08 Nov 1991 UTC via a TITAN 403A 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.

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<iframe src="https://www.satcat.com/sats-embedded/21775?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/21775?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21775, 1991-076A

Orbit

HEO

Last TLE update

5 days ago

Origin

National Reconnaissance Office (US)

Manufacturer

NRL

Mission

Defense Sigint

Bus & Motor

NOSS B, Unknown motor

Mass

~3,000 kg wet, ~3,000 kg dry

Launch date (UTC)

1991-11-08 (34 years ago)

Launch vehicle

TITAN 403A

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 1 m

Radar Cross Section

1.178 m²

Expand to show TLE details & history

TLE from 5 days ago

0 USA 72
1 21775U 91076A   25186.89554414 -.00000043  00000-0  00000-0 0  9995
2 21775  63.3994 352.8525 3368465 272.6370  50.0101  5.53393877 23394

Epoch: 2025-07-05T21:29Z

TLE epoch observation values (Epoch: 2025-07-05T21:29:35.013Z)

Latitude

-0.00009°

Longitude

106.32545°

Altitude

5,412 km

Speed

6.173 km/s

True Right ascension

23h 31m 23s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

52.91075°

Longitude

145.44872°

Altitude

10,557.726 km

Speed

4.193 km/s

Apparent Right ascension

03h 56m 56s

Apparent Declination

41° 48' 51"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

20:48:35

Azimuth

47.539° ENE

Elevation

15.06°

Doppler factor

Orbital elements

Apogee altitude

11,670.138 km

Perigee altitude

2,574.856 km

Semi-major axis

13,500.634 km

Eccentricity

0.33685

Inclination

63.3994°

RAAN

352.8525°

Arg. of periapsis

272.637°

True anomaly

Unknown

Mean anomaly

50.0101°

Eccentric anomaly

Unknown

Mean motion

1.3836 °/min

Orbital period

260.19 mins

BSTAR

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Other satellites on launch #76 in the year 1991 (1991-11-08 UTC)

USA 72 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.
17 mins	2025-07-11 08:31:01.510Z	47.572° ENE	2025-07-11 08:31:01.510Z	47.572° ENE	14.556°	2025-07-11 08:48:01.510Z	35.072° NE
123 mins	2025-07-11 11:55:01.510Z	200.041° SSW	2025-07-11 12:31:01.510Z	114.914° SE	44.955°	2025-07-11 13:58:01.510Z	42.118° NE
147 mins	2025-07-11 16:43:01.510Z	283.823° WNW	2025-07-11 18:07:01.510Z	19.959° NNE	39.934°	2025-07-11 19:10:01.510Z	105.125° ESE
113 mins	2025-07-11 21:52:01.510Z	325.977° NNW	2025-07-11 23:08:01.510Z	265.247° W	40.769°	2025-07-11 23:45:01.510Z	191.346° SSW

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Check out USA 72, 21775 on other resources

View USA 72, 21775 on NASA - NSSDCA Website

View USA 72, 21775 on Heavens-Above

View USA 72, 21775 on Keep Track

View USA 72, 21775 on Celestrak

View USA 72, 21775 on Gunter's Space Page

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