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ORBCOMM FM 21, 25475

Orbit data source: Space-Track

ORBCOMM FM 21, 25475 is a payload satellite in LEO that was launched on Wed, 23 Sep 1998 UTC via a PEGASUS XL/HAPS launch vehicle from the Pegasus Launch, Eastern Range Air Space (ERAS). 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/25475?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

25475, 1998-053A

Orbit

LEO

Last TLE update

10 hours ago

Origin

Orbcomm Inc. (US)

Manufacturer

OSC-Germantown

Mission

Non-operational Commercial Communications

Bus & Motor

MICROSTAR, Unknown motor

Mass

42 kg wet, 42 kg dry

Launch date (UTC)

1998-09-23 (27 years ago)

Launch vehicle

PEGASUS XL/HAPS

Launch site

Pegasus Launch, Eastern Range Air Space (ERAS)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 2 Pan, 4.3 m

Radar Cross Section

1.484 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 10 hours ago

0 ORBCOMM FM 21
1 25475U 98053A   25143.13709279  .00000768  00000-0  30231-3 0  9994
2 25475  45.0097  28.1176 0001611  62.8289 297.2723 14.37303743393977

Epoch: 2025-05-23T03:17Z

TLE epoch observation values (Epoch: 2025-05-23T03:17:24.817Z)

Latitude

-0.00001°

Longitude

97.76756°

Altitude

766.893 km

Speed

7.473 km/s

True Right ascension

01h 52m 28s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-42.15514°

Longitude

31.6733°

Altitude

781.463 km

Speed

7.463 km/s

Apparent Right ascension

17h 37m 20s

Apparent Declination

-84° 17' 02"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

22:03:16

Azimuth

186.605° SSW

Elevation

-37.445°

Doppler factor

Orbital elements

Apogee altitude

770.116 km

Perigee altitude

767.813 km

Semi-major axis

7,147.102 km

Eccentricity

0.00016

Inclination

45.0097°

RAAN

28.1176°

Arg. of periapsis

62.8289°

True anomaly

Unknown

Mean anomaly

297.2723°

Eccentric anomaly

Unknown

Mean motion

3.5921 °/min

Orbital period

100.22 mins

BSTAR

0.00030231

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Other satellites on launch #53 in the year 1998 (1998-09-23 UTC)

PEGASUS R/B(1), 25483 (Decayed)

PEGASUS R/B(2), 25484

ORBCOMM FM 21 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.
8 mins	2025-05-23 18:27:10.136Z	192.578° SSW	2025-05-23 18:31:10.136Z	142.992° SSE	23.168°	2025-05-23 18:35:10.136Z	88.591° E
9 mins	2025-05-23 20:12:10.136Z	243.861° WSW	2025-05-23 20:16:10.136Z	199.476° SSW	44.969°	2025-05-23 20:21:10.136Z	66.86° ENE
8 mins	2025-05-23 21:58:10.136Z	284.982° WNW	2025-05-23 22:02:10.136Z	7.778° NNE	37.302°	2025-05-23 22:06:10.136Z	67.355° ENE
8 mins	2025-05-23 23:44:10.136Z	299.447° NW	2025-05-23 23:47:10.136Z	348.456° N	40.359°	2025-05-23 23:52:10.136Z	93.284° ESE
8 mins	2025-05-24 01:29:10.136Z	283.207° WNW	2025-05-24 01:33:10.136Z	202.608° SW	38.515°	2025-05-24 01:37:10.136Z	139.87° SSE

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Check out ORBCOMM FM 21, 25475 on other resources

View ORBCOMM FM 21, 25475 on NASA - NSSDCA Website

View ORBCOMM FM 21, 25475 on Heavens-Above

View ORBCOMM FM 21, 25475 on Keep Track

View ORBCOMM FM 21, 25475 on Celestrak

View ORBCOMM FM 21, 25475 on Gunter's Space Page

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