| A | B |
|---|---|
| picture credit: NASA | … |
| Names | Granat Astron 2 |
| Mission type | Astronomy |
| Operator | Soviet space program Roscosmos |
| COSPAR ID | 1989-096A |
| SATCAT no. | 20352 |
| Website | hea.iki.rssi.ru |
| Mission duration | 8 years, 11 months and 26 days |
| Spacecraft properties | … |
| Bus | 4MV |
| Manufacturer | NPO Lavochkin1 |
| Launch mass | ~4,400 kg (9,700 lb) |
| Payload mass | ~2,300 kg (5,100 lb) |
| Dimensions | 4.0 × 2.5 m (13.1 × 8.2 ft) |
| Power | 400 W |
| Start of mission | … |
| Launch date | 20:20, December 1, 1989 (UTC)2 |
| Rocket | Proton-K/D-13 |
| Launch site | Baikonur 200/40 |
| End of mission | … |
| Disposal | Deorbited |
| Last contact | 27 November 1998 |
| Decay date | May 25, 19992 |
| Orbital parameters | … |
| Reference system | Geocentric1 |
| Regime | Highly elliptical |
| Eccentricity | 0.92193 |
| Perigee altitude | 1,760 kilometres (1,090 mi)4 |
| Apogee altitude | 202,480 kilometres (125,820 mi) |
| Inclination | 51.9 degrees |
| Period | 5,880 minutes |
| Epoch | 01 December 1989 |
| Main telescope | … |
| Name | SIGMA |
| Type | Coded mask |
| Diameter | 1.2 metres (3.9 ft) |
| Focal length | 2.5 metres (8.2 ft) |
| Collecting area | 800 cm (120 sq in) |
| Wavelengths | X-ray to γ-ray, 1–620 pm (2 keV – 1.3 MeV) |
| Instruments | … |
International Astrophysical Observatory
(echo:: @ ᯤ)
Footnotes
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“Granat X-ray and Gamma-ray Observatory”. The Federation of American Scientists. Archived from the original on 2007-02-06. Retrieved 2007-12-06. ↩ ↩2
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“1999 Reentries” (PDF). The Aerospace Corporation, Center for Orbital and Reentry Debris Studies. Archived from the original (PDF) on 2005-01-22. Retrieved 2007-12-06. ↩ ↩2
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“GRANAT”. NASA HEASARC. Archived from the original on 2016-03-06. Retrieved 2007-12-05. ↩
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(in Russian) N.G. Kuleshova, I.D. Tserenin, A.I. Sheikhet, from NPO Lavochkin, Orbital Astrophysical Observatory “Granat”: Problems of Control Archived 2007-10-31 at the Wayback Machine, Zemlya i Vselennaya, 1994, no. 2. Only four rows from a table of twenty used here. ↩