Spacecraft information: IRS-1B
| Launched | 28 August 1991 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Tyuratam Missile and Space Center, Kazakhstan (Also known as Baikonur Cosmodrome) |
| Owner | India |
| NORAD ID | 21688 |
| COSPAR ID | 1991-061A |
| Observing |
Current orbital elements
| Inclination | 99.413° |
| Eccentricity | 0.00241 |
| RA ascending node | 16.037 hr |
| Argument perigee | 189.728° |
| Mean anomaly | 233.477° |
| Orbital period | 103.013 min |
| Epoch of osculation | 19 Aug 2026, 00:49 |
Derived Quantities
| Min Altitude | 890.7 km |
| Mean Altitude | 908.3 km |
| Peak Altitude | 925.8 km |
Launched alongside
SL-3 R/BOrbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.