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INMARSAT 3-F4, 24819

Orbit data source: Space-Track

INMARSAT 3-F4, 24819 is a payload satellite owned by INMARSAT (UK) in GEO that was launched on Tue, 03 Jun 1997 UTC via an ARIANE 44L launch vehicle from the French Guiana (FRGUI). 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/24819?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/24819?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

24819, 1997-027A

Orbit

GEO

Last TLE update

6 hours ago

Origin

International Maritime Satellite Organization (IM)

Manufacturer

LMT/EW

Mission

Non-operational Civil Communications

Bus & Motor

AS4000, STAR 37FM

Mass

1,999 kg wet, 813 kg dry

Launch date (UTC)

1997-06-03 (28 years ago)

Launch vehicle

ARIANE 44L

Launch site

French Guiana (FRGUI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Hex Poly + 2 Pan, 10.3 m

Radar Cross Section

67.817 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 6 hours ago

0 INMARSAT 3-F4
1 24819U 97027A   25201.18884510  .00000031  00000-0  00000+0 0  9997
2 24819  10.9154  40.3670 0011799  61.9725 150.3017  0.99494271102761

Epoch: 2025-07-20T04:31Z

TLE epoch observation values (Epoch: 2025-07-20T04:31:56.216Z)

Latitude

-5.82265°

Longitude

-113.9539°

Altitude

36,050.089 km

Speed

3.064 km/s

True Right ascension

16h 48m 58s

True Declination

-5° 49' 01"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-9.75292°

Longitude

-28.57558°

Altitude

36,036.303 km

Speed

3.065 km/s

Apparent Right ascension

22h 25m 51s

Apparent Declination

-16° 55' 26"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

23:05:37

Azimuth

191.285° SSW

Elevation

32.409°

Doppler factor

Orbital elements

Apogee altitude

36,056.998 km

Perigee altitude

35,956.978 km

Semi-major axis

42,385.125 km

Eccentricity

0.00118

Inclination

10.9154°

RAAN

40.367°

Arg. of periapsis

61.9725°

True anomaly

150.3686°

Mean anomaly

150.3017°

Eccentric anomaly

150.33516°

Mean motion

0.24873 °/min

Orbital period

1,447.37 mins

BSTAR

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Other satellites on launch #27 in the year 1997 (1997-06-03 UTC)

INSAT 2D, 24820

ARIANE 44L R/B, 24821 (Decayed)

ARIANE 44L DEB (SPELDA), 24822 (Decayed)

INMARSAT 3-F4 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	2025-07-20 10:12:18.732Z	191.281° SSW	2025-07-20 20:35:18.732Z	200.131° SSW	39.2°	2025-07-21 10:12:18.732Z	194.779° SSW

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24819 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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Check out INMARSAT 3-F4, 24819 on other resources

View INMARSAT 3-F4, 24819 on NASA - NSSDCA Website

View INMARSAT 3-F4, 24819 on Heavens-Above

View INMARSAT 3-F4, 24819 on Keep Track

View INMARSAT 3-F4, 24819 on Celestrak

View INMARSAT 3-F4, 24819 on Gunter's Space Page

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