ASTRO-EII
A picture of a fully integrated Astro-E2 before vibration tests at ISAS/JAXA.
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| Mission type | Astronomy |
|---|---|
| Operator | JAXA / NASA |
| COSPAR ID | 2005-025A |
| SATCAT no. | 28773 |
| Website | www |
| Mission duration | Planned: 2 years Actual: 10 years, 1 month, 23 days |
| Spacecraft properties | |
| Manufacturer | Toshiba |
| Launch mass | 1,706 kilograms (3,761 lb) |
| Start of mission | |
| Launch date | 2005-07-10, 03:30:00 UTC |
| Rocket | M-V-6 |
| Launch site |
Uchinoura Space Center Uchinoura, Kagoshima, Japan |
| End of mission | |
| Decay date | no earlier than 2020 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee | 550 kilometres (340 mi) |
| Apogee | 550 kilometres (340 mi) |
| Inclination | 31 degrees |
| Period | 96 minute |
| Main telescope | |
| Wavelengths | X-ray |
The M-V rocket carrying ASTRO-E veering off course after launch on 10 February 2000.
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| Operator | Institute of Space and Astronautical Science (ISAS) |
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| Start of mission | |
| Launch date | 01:30:00, February 10, 2000 |
| Rocket | M-V-4 |
| Launch site | Kagoshima Space Center |
Suzaku (formerly ASTRO-EII) was an X-ray astronomy satellite developed jointly by NASA's Goddard Space Flight Center and the Institute of Space and Aeronautical Science at JAXA to probe high energy X-ray sources, such as supernova explosions, black holes and galactic clusters. It was launched on 10 July 2005 aboard the M-V-6 rocket. After its successful launch, the satellite was renamed Suzaku after the mythical Vermilion bird of the South.
Just weeks after launch, on 29 July 2005 the first of a series of cooling system malfunctions occurred. These ultimately caused the entire reservoir of liquid helium to boil off into space by 8 August 2005. This effectively shut down the X-ray Spectrometer (XRS), which was the spacecraft's primary instrument. The two other instruments, the X-ray Imaging Spectrometer (XIS) and the Hard X-ray Detector (HXD), were unaffected by the malfunction. As a result, another XRS was integrated into the Hitomi X-ray satellite, launched in 2016.
On 26 August 2015, JAXA announced that communications with Suzaku had been intermittent since 1 June, and that the resumption of scientific operations would be difficult to accomplish given the spacecraft's condition. Mission operators decided to complete the mission imminently, as Suzaku had exceeded its design lifespan by eight years at this point. The mission came to an end on 2 September 2015, when JAXA commanded the radio transmitters on Suzaku to switch themselves off.
Suzaku is carrying high spectroscopic resolution, very wide energy band instruments for detecting signals ranging from soft X-rays up to gamma-rays (0.3–600 keV). High resolution spectroscopy and wide-band are essential factors to physically investigate high energy astronomical phenomena, such as black holes and supernovae. One such feature, the broad iron K line, may be key to more direct imaging of black holes.
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