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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 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

8 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 8 hours ago

0 LDPE-1
1 49818U 21118B   25183.90754071 -.00000250  00000-0  00000-0 0  9993
2 49818   2.8312  83.2120 0006939   5.4458  78.4320  1.00652868 13135

Epoch: 2025-07-02T21:46Z

TLE epoch observation values (Epoch: 2025-07-02T21:46:51.517Z)

Latitude

2.82892°

Longitude

-80.72497°

Altitude

35,673.389 km

Speed

3.079 km/s

True Right ascension

11h 08m 41s

True Declination

2° 49' 34"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-0.96269°

Longitude

34.75817°

Altitude

35,708.177 km

Speed

3.077 km/s

Apparent Right ascension

19h 03m 04s

Apparent Declination

-7° 13' 28"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

17:11:44

Azimuth

144.912° SSE

Elevation

36.311°

Doppler factor

Orbital elements

Apogee altitude

35,710.355 km

Perigee altitude

35,651.985 km

Semi-major axis

42,059.307 km

Eccentricity

0.00069

Inclination

2.8312°

RAAN

83.212°

Arg. of periapsis

5.4458°

True anomaly

Unknown

Mean anomaly

78.432°

Eccentric anomaly

Unknown

Mean motion

0.25162 °/min

Orbital period

1,430.71 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	2025-07-03 05:26:13.986Z	144.924° SSE	2025-07-03 21:54:13.986Z	141.13° SSE	32.448°	2025-07-04 05:26:13.986Z	143.327° SSE

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.