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ERS-1 (21574)
COSPAR: 1991-050A | Alt Name: ERS-1
Image
Additional Sources
Launch Details
Launch Date
July 17, 1991
Launch Site
FRGUI
Launch Pad
ELA2
Launch Vehicle
Ariane 40
Orbital Elements
NORAD ID
21574
International Designator
1991-050A
Epoch
Fri, 03 Jul 2026 11:58:38 GMT
Apogee
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Perigee
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Inclination
98.78°
Right Ascension
205.60°
Eccentricity
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Argument of Perigee
216.94°
Period
100.03 min
Mean Motion
14.40 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
ERS-1
Alternative Name
ERS-1
Type
Payload
Status
Non-operational
Owner
ESA
Country
European Space Agency
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 21574U 91050A 26184.49905614 .00000363 00000-0 13050-3 0 9997
2 21574 98.7793 205.5954 0031220 216.9380 142.9657 14.39528005832397
Source: Celestrak
Summary
ERS-1 is an Earth observation satellite operated by ESA (European Space Agency). Launched on July 17, 1991, from ELA2 at Kourou, French Guiana, using an Ariane 40 launch vehicle, it has dimensions of 11.8 meters in length and span with a diameter of 2.5 meters. ERS-1 was manufactured by DASAF and carries the ESA ERS bus configuration similar to SPOT Mk.1 satellites. The satellite weighs 2384 kg at launch, with a dry mass of 2080 kg, powered by deployable solar arrays and batteries. Its mission involves Earth observation using equipment designated as ERS-1 payload.
Physical Characteristics
Length
11.8
Diameter
2.5
Span
11.8
Dry Mass
2080
Launch Mass
2384
Shape
Box + Pan
Radar Cross Section
10.3234
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
ERS-1
Purpose
Earth observation
Mission
Earth observation
Manufacturer
DASAF
Life Expectancy
Unknown
Bus
ESA ERS
Configuration
SPOT Mk.1
Motor
ERS AOCS
Equipment
see above
Power System
Deployable solar array, 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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