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LDPE-1, 49818

Orbit data source: Space-Track

LDPE-1, 49818 is a payload satellite owned by AFRL/RV (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 src="https://www.satcat.com/sats-embedded/49818?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/49818?theme=dark&initialShowStats=false

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Identifier

49818, 2021-118B

Orbit

GEO

Last TLE update

14 hours ago

Origin

United States Air Force (US)

Manufacturer

NGIS

Mission

Operational Defense Technology

Bus & Motor

ESPASTAR, Unknown motor

Mass

~500 kg wet, 500 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

Cyl + 1 Pan, 3.6 m

Radar Cross Section

3.054 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 14 hours ago

0 LDPE-1
1 49818U 21118B   25190.13794872 -.00000265  00000-0  00000+0 0  9994
2 49818   2.8454  83.1343 0007052   7.5449 174.0278  1.00650838 13183

Epoch: 2025-07-09T03:18Z

TLE epoch observation values (Epoch: 2025-07-09T03:18:38.769Z)

Latitude

-0.10002°

Longitude

-72.26546°

Altitude

35,709.804 km

Speed

3.076 km/s

True Right ascension

17h 38m 52s

True Declination

0° 05' 60"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

1.39456°

Longitude

134.83142°

Altitude

35,652.224 km

Speed

3.081 km/s

Apparent Right ascension

07h 43m 37s

Apparent Declination

-4° 34' 59"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

05:12:46

Azimuth

132.933° SE

Elevation

33.61°

Doppler factor

Orbital elements

Apogee altitude

35,711.396 km

Perigee altitude

35,652.075 km

Semi-major axis

42,059.872 km

Eccentricity

0.00071

Inclination

2.8454°

RAAN

83.1343°

Arg. of periapsis

7.5449°

True anomaly

Unknown

Mean anomaly

174.0278°

Eccentric anomaly

Unknown

Mean motion

0.25162 °/min

Orbital period

1,430.74 mins

BSTAR

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49818 neighbors

Authenticating...

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

STPSAT-6, 49817

ATLAS 5 CENTAUR R/B, 49819

ATLAS 5 CENTAUR DEB, 50214

ASCENT, 51287

LDPE-1 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.
1440 mins	2025-07-09 17:01:41.771Z	132.947° SE	2025-07-09 20:50:41.771Z	131.513° SE	29.677°	2025-07-10 17:01:41.771Z	131.392° SE

Authenticating...

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Check out LDPE-1, 49818 on other resources

View LDPE-1, 49818 on NASA - NSSDCA Website

View LDPE-1, 49818 on Heavens-Above

View LDPE-1, 49818 on Keep Track

View LDPE-1, 49818 on Celestrak

View LDPE-1, 49818 on Gunter's Space Page

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