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INMARSAT 3-F4 (24819)
COSPAR: 1997-027A | Alt Name: INMARSAT III F-4
Image
Additional Sources
Launch Details
Launch Date
June 3, 1997
Launch Site
FRGUI
Launch Pad
ELA2
Launch Vehicle
Ariane 44L
Orbital Elements
NORAD ID
24819
International Designator
1997-027A
Epoch
Fri, 03 Jul 2026 20:45:23 GMT
Apogee
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Perigee
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Inclination
11.55°
Right Ascension
37.59°
Eccentricity
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Argument of Perigee
63.94°
Period
1447.19 min
Mean Motion
1.00 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
INMARSAT 3-F4
Alternative Name
INMARSAT III F-4
Type
Payload
Status
Non-operational
Owner
INMAR
Country
INMARSAT
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 24819U 97027A 26184.86485215 -.00000164 00000-0 00000-0 0 9991
2 24819 11.5527 37.5903 0011121 63.9400 127.1055 0.99503218106221
Source: Celestrak
Summary
INMARSAT 3-F4, also known as INMARSAT III F-4, is a communication satellite launched on June 3, 1997, from the ELA2 pad at Kourou, French Guiana using an Ariane 44L launch vehicle. The spacecraft has dimensions of 7.6 meters in length, 2.3 meters in diameter, and a span of 20.7 meters with solar arrays deployed. It was manufactured by LMTEW (Lockheed Martin Telecommunications & Electronics West) and has a dry mass of 813 kilograms. The satellite is equipped with 22 L-band transponders (+11 spare), C-band uplink, and two deployable solar arrays for power generation along with batteries. Its mission was to provide communication services, and it had an operational lifetime of 13 years. The satellite's structure consists of a box shape with two panels and has a radar cross-section (RCS) of 28.8195 square meters. It is owned by INMAR (International Mobile Satellite Organization).
Physical Characteristics
Length
7.6
Diameter
2.3
Span
20.7
Dry Mass
813
Launch Mass
1068
Shape
Box + 2 Pan
Radar Cross Section
28.8195
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
INMARSAT III F-4
Purpose
Communication
Mission
Communication
Manufacturer
LMTEW
Life Expectancy
13 years
Bus
AS4000
Configuration
AS-4000
Motor
Star 37FM
Equipment
22 (+11) L-band transponders (22W Power amplifiers), C-band uplink
Power System
2 deployable solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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