About IRS-1B
Group: 3 satellites
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Live Position
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Upcoming Passes
Altitude History
Altitude vs Time
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Two-Line Element Set
1 21688U 91061A 25326.55803212 -.00000210 00000-0 -11520-3 0 9993
2 21688 99.4092 324.3841 0024163 203.2880 265.9718 13.97833084639624
Epoch: Nov 22, 2025 •
Age: 7 hours
Current Status
Altitude 887.9 km
Velocity 7.42 km/s
Sub-Earth Point 0.50°N,
133.7°E
Launch Date Aug 29, 1991
Age 34.2 years
Type other
Technical Details
Classification Payload
Mass 990.00 kg
Dry Mass 960.00 kg
Total Mass 990.00 kg
Length 1.60 m
Diameter 1.10 m
Span 12.00 m
Shape Box + 2 Pan
Manufacturer ISRO
Bus Type IRS
Phase Status In Orbit
Owner/State ISRO/IN
Large Constellations
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