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STPSAT-6, 49817

Orbit data source: Space-Track

STPSAT-6, 49817 is a payload satellite owned by USAF STP (US) in GEO that was launched on Tue, 07 Dec 2021 UTC via an ATLAS V 551 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/49817?theme=dark&initialShowStats=false

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Identifier

49817, 2021-118A

Orbit

GEO

Country

Related business

United States Space Force (US)

Manufacturer

NGAS

Mission

Operational Defense Technology

Bus & Motor

A-500, Unknown motor

Mass

~1,000 kg wet, ~1,000 kg dry

Launch date (UTC)

2021-12-07 (4 years ago)

Launch vehicle

ATLAS V 551

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 1 Pan, 1.0 m

Radar Cross Section

2.500 m², Large (>1 m²)

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

TLE from 6 hours ago

0 STPSAT-6
1 49817U 21118A   25259.20469288  .00000000  00000-0  00000-0 0  9994
2 49817   0.0216 165.8030 0001834 110.2686  41.2575  1.00271159 13827

Epoch: 2025-09-16T04:54Z

TLE epoch observation values (Epoch: 2025-09-16T04:54:45.464Z)

Latitude

0.01769°

Longitude

-111.74488°

Altitude

35,780.453 km

Speed

3.075 km/s

True Right ascension

21h 09m 22s

True Declination

0° 01' 04"

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

03:50:50

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,795.574 km

Perigee altitude

35,780.108 km

Semi-major axis

42,165.978 km

Eccentricity

0.00018

Inclination

0.0216°

RAAN

165.803°

Arg. of periapsis

110.2686°

True anomaly

41.27136°

Mean anomaly

41.2575°

Eccentric anomaly

41.26443°

Mean motion

0.25067 °/min

Orbital period

1,436.16 mins

BSTAR

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Computing Atmospheric mass density...

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Other satellites on launch #118 in the year 2021 (2021-12-07 UTC)

LDPE-1, 49818

ATLAS 5 CENTAUR R/B, 49819

ATLAS 5 CENTAUR DEB, 50214

ASCENT, 51287

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STPSAT-6 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.
1440 mins	2025-09-16 11:08:41.471Z	190.256° SSW	2025-09-17 01:30:41.471Z	190.302° SSW	34.477°	2025-09-17 11:08:41.471Z	190.257° SSW

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49817 neighbors

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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 STPSAT-6, 49817 on other resources

View STPSAT-6, 49817 on NASA - NSSDCA Website

View STPSAT-6, 49817 on Heavens-Above

View STPSAT-6, 49817 on Keep Track

View STPSAT-6, 49817 on Celestrak

View STPSAT-6, 49817 on Gunter's Space Page

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

STPSAT-6, 49817

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: 2025-09-16T04:54:45.464Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #118 in the year 2021 (2021-12-07 UTC)

STPSAT-6 Visibility forecast

49817 neighbors

Co-orbital & Co-planar RSOs

Check out STPSAT-6, 49817 on other resources

Documentation

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