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TELECOM 1B (15678)
COSPAR: 1985-035B | Alt Name: Telecom 1B
Image
Additional Sources
Launch Details
Launch Date
May 8, 1985
Launch Site
FRGUI
Launch Pad
ELA1
Launch Vehicle
Ariane 3
Orbital Elements
NORAD ID
15678
International Designator
1985-035B
Epoch
Thu, 02 Jul 2026 05:13:52 GMT
Apogee
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Perigee
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Inclination
10.11°
Right Ascension
320.83°
Eccentricity
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Argument of Perigee
338.35°
Period
1435.28 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
TELECOM 1B
Alternative Name
Telecom 1B
Type
Payload
Status
Non-operational
Owner
FTEL
Country
France
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 15678U 85035B 26183.21796852 -.00000257 00000-0 00000+0 0 9992
2 15678 10.1149 320.8331 0000892 338.3481 18.2698 1.00328810137169
Source: Celestrak
Summary
TELECOM 1B is a communication satellite identified by NORAD CAT ID 15678 and OBJECT ID 1985-035B. Launched on May 8, 1985, from ELA1 launch pad at the Guiana Space Centre using an Ariane 3 rocket, this satellite was owned and operated by FTEL. Built by MATT with a configuration known as ECS-Bus, TELECOM 1B has dimensions of 3 meters in length, 1.4 meters in diameter, and spans 16 meters when its solar arrays are deployed. The satellite's dry mass is 525 kg, with a launch mass of 664 kg. Its power system consists of two deployable solar arrays and batteries. TELECOM 1B is equipped with six (+3) Ku-band transponders, four (+2) C-band transponders, and two X-band transponders for its communication mission. The satellite's shape is described as a box with two panels, and it has an RCS of 2.5119 square meters. It was designed to operate for approximately seven years post-launch.
Physical Characteristics
Length
3
Diameter
1.4
Span
16
Dry Mass
525
Launch Mass
664
Shape
Box + 2 Pan
Radar Cross Section
2.5119
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Telecom 1B
Purpose
Communication
Mission
Communication
Manufacturer
MATT
Life Expectancy
7 years
Bus
ECS
Configuration
ECS-Bus
Motor
Mage 2
Equipment
6 (+3) Ku-band transponder, 4 (+2) C-band transponder, 2 X-band transponder
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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