Tenma
| Tenma (ASTRO-B) | |
|---|---|
|
|
| Type: | X-ray telescope |
| Country: |
 Japan
|
| Operator: | Institute of Space and Astronautical Science |
| COSPAR-ID : | 1983-011A |
| Mission dates | |
| Dimensions: | 216 kg |
| Begin: | February 20, 1983, 05:10 UTC |
| Starting place: | Kagoshima Space Center |
| Launcher: | M-3S |
| Status: | burned up on January 19, 1989 |
| Orbit data | |
| Rotation time : | min |
| Orbit inclination : | 31.5 ° |
| Apogee height : | 503 km |
| Perigee height : | 489 km |
Tenma was the second Japanese space telescope for X-ray astronomy . The original project name ASTRO-B was changed to Tenma after the start.
Tenma was launched from the Kagoshima Space Center on February 20, 1983 with an M-3S rocket and was in operation until November 11, 1985, since July 1984 with reduced effectiveness due to a battery problem. On January 19, 1989, Tenma re-entered the earth's atmosphere. The X-ray satellite developed by the Institute of Space and Astronautical Science had instruments for the X-ray range between energies of 0.1 and 60 keV . The main instrument was an am gas scintillation proportional counter for 2-60 keV. With its improved energy resolution (about 9.5% at an energy of 6 keV) Tenma was able to study the X-ray emission lines of iron at 6.3-6.7 keV in X-ray binary stars , the Milky Way and active galactic nuclei .
Web links
- Gunter's Space Page: Astro B (Tenma) (English)