Akari (satellite)
AKARI (ASTRO-F) was an infrared astronomy satellite developed by Japan Aerospace Exploration Agency, in cooperation with institutes of Europe and Korea. It was launched on 21 February 2006, at 21:28 UTC (06:28, 22 February JST) by M-V rocket into Earth Sun-synchronous orbit. After its launch it was named AKARI (明かり), which means light in Japanese. Earlier on, the project was known as IRIS (InfraRed Imaging Surveyor).
Artist's conception of AKARI | |
| Mission type | Infrared telescope |
|---|---|
| Operator | JAXA |
| COSPAR ID | 2006-005A |
| SATCAT no. | 28939 |
| Website | global |
| Mission duration | 5 years, 9 months |
| Spacecraft properties | |
| Manufacturer | ISAS |
| Launch mass | 952 kg (2,099 lb) |
| Dimensions | 5.5 m × 1.9 m × 3.2 m (18.0 ft × 6.2 ft × 10.5 ft) |
| Start of mission | |
| Launch date | 21:28, 21 February 2006 (UTC) |
| Rocket | M-V, mission M-V-8 |
| Launch site | M-V Pad, Uchinoura Space Center |
| End of mission | |
| Disposal | decommissioned |
| Deactivated | 24 November 2011 |
| Decay date | 11 April 2023, 04:44 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Sun-synchronous |
| Semi-major axis | 6,884 km (4,278 mi) |
| Eccentricity | 0.0129527 |
| Perigee altitude | 423.9 km (263.4 mi) |
| Apogee altitude | 602.3 km (374.3 mi) |
| Inclination | 98.2 degrees |
| Period | 94.7 minutes |
| RAAN | 305.9392 degrees |
| Argument of perigee | 124.2012 degrees |
| Mean anomaly | 354.1441 degrees |
| Mean motion | 15.1995622 rev/day |
| Epoch | 9 July 2015, 13:43:21 UTC |
| Revolution no. | 50455 |
| Main | |
| Type | Ritchey–Chrétien |
| Diameter | 0.67 m (2.2 ft) |
| Focal length | 4.2 m (14 ft) |
| Wavelengths | 1.7 to 180 μm (Infrared) |
| Instruments | |
| FIS: Far-Infrared Surveyor IRC: Infra-Red Camera | |
Its primary mission was to survey the entire sky in near-, mid- and far-infrared, through its 68.5 cm (27.0 in) aperture telescope.
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