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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

6 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 6 days ago

0 USA 72
1 21775U 91076A   25180.39023260 -.00000044  00000-0  00000-0 0  9995
2 21775  63.3997 355.5345 3368491 272.6316  50.0136  5.53393672 23038

Epoch: 2025-06-29T09:21Z

TLE epoch observation values (Epoch: 2025-06-29T09:21:56.096Z)

Latitude

-0.00002°

Longitude

-62.66841°

Altitude

5,412.301 km

Speed

6.173 km/s

True Right ascension

23h 42m 07s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

28.0599°

Longitude

99.60876°

Altitude

8,402.583 km

Speed

4.943 km/s

Apparent Right ascension

10h 49m 08s

Apparent Declination

19° 13' 05"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

10:01:08

Azimuth

150.008° SSE

Elevation

66.871°

Doppler factor

Orbital elements

Apogee altitude

11,670.178 km

Perigee altitude

2,574.823 km

Semi-major axis

13,500.637 km

Eccentricity

0.33685

Inclination

63.3997°

RAAN

355.5345°

Arg. of periapsis

272.6316°

True anomaly

Unknown

Mean anomaly

50.0136°

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.
27 mins	2025-07-04 22:08:56.020Z	150.095° SSE	2025-07-04 22:08:56.020Z	150.095° SSE	42.588°	2025-07-04 22:35:56.020Z	154.699° SSE
69 mins	2025-07-05 01:31:56.020Z	326.822° NNW	2025-07-05 02:10:56.020Z	296.12° NW	19.376°	2025-07-05 02:40:56.020Z	258.424° W
65 mins	2025-07-05 08:41:56.020Z	100.013° ESE	2025-07-05 09:08:56.020Z	63.731° ENE	19.022°	2025-07-05 09:46:56.020Z	32.838° NE
127 mins	2025-07-05 12:47:56.020Z	206.739° SW	2025-07-05 13:25:56.020Z	298.289° NW	44.971°	2025-07-05 14:54:56.020Z	44.77° NE
146 mins	2025-07-05 17:39:56.020Z	289.215° WNW	2025-07-05 19:06:56.020Z	26.5° NE	40.6°	2025-07-05 20:05:56.020Z	111.67° ESE

Authenticating...

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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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