Showing default

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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/49817?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/49817?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

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 (5 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, 1.5 m

Radar Cross Section

2.500 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 11 hours ago

TLE from 11 hours ago

0 STPSAT-6
1 49817U 21118A   26258.19443863 -.00000051  00000-0  00000-0 0  9990
2 49817   0.5474  84.2370 0000945 212.6495  15.3541  1.00272019 17472

Epoch: 2026-09-15T04:39Z

TLE epoch observation values (Epoch: 2026-09-15T04:39:59.497Z)

Latitude

-0.39237°

Longitude

-111.92671°

Altitude

35,782.233 km

Speed

3.075 km/s

True Right ascension

20h 48m 56s

True Declination

0° 23' 31"

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

08:08:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

35,791.584 km

Perigee altitude

35,783.615 km

Semi-major axis

42,165.737 km

Eccentricity

0.00009

Inclination

0.5474°

RAAN

84.237°

Arg. of periapsis

212.6495°

True anomaly

15.35697°

Mean anomaly

15.3541°

Eccentric anomaly

15.35553°

Mean motion

0.25067 °/min

Orbital period

1,436.15 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

LDPE-1, 49818

ATLAS 5 CENTAUR R/B, 49819

ASCENT, 51287

ATLAS 5 CENTAUR DEB, 50214

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

STPSAT-6 Visibility forecast

Loading observer location...
Set Observer location

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	2026-09-15 15:30:06.310Z	190.61° SSW	2026-09-15 19:36:06.310Z	190.686° SSW	43.919°	2026-09-16 15:30:06.310Z	190.613° SSW

Items per page:

1–1 of 1 items

of 1 page

Loading historical data...

49817 neighbors

Authenticating...

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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 descending order

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: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-09-15T04:39:59.497Z)

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: 11 hours ago