 A picture of a fully integrated Astro-E2 before vibration tests atISAS/JAXA. | |
| Names | ASTRO-EII |
|---|---|
| Mission type | Astronomy |
| Operator | JAXA / NASA |
| COSPAR ID | 2005-025A |
| SATCATno. | 28773 |
| Website | www |
| Mission duration | 2 years (planned) 10 years 1 month 23 days (achieved) |
| Spacecraft properties | |
| Spacecraft type | ASTRO |
| Bus | ASTRO-E |
| Manufacturer | Toshiba[1] |
| Launch mass | 1,706 kg (3,761 lb)[2] |
| Dimensions | 2 metres x 5 metres |
| Power | 500watts |
| Start of mission | |
| Launch date | 10 July 2005, 03:30:00UTC |
| Rocket | M-V # 6 |
| Launch site | Uchinoura Space Center, Uchinoura, Kagoshima |
| End of mission | |
| Deactivated | 2 September 2015 |
| Decay date | 5 January 2025[3] |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Low Earth orbit |
| Perigee altitude | 550 km (340 mi) |
| Apogee altitude | 550 km (340 mi) |
| Inclination | 31° |
| Period | 96 minutes |
| Instruments | |
| X-ray Spectrometer-2 (XRS-2) X-ray Imaging Spectrometer (XIS) Hard X-ray Detector (HXD) | |
 TheM-V launch vehicle carrying ASTRO-E veering off course after launch on 10 February 2000. | |
| Mission type | Astronomy |
|---|---|
| Operator | Institute of Space and Astronautical Science (ISAS) /NASA |
| COSPAR ID | 2005-025A |
| SATCATno. | 28773 |
| Mission duration | Failed to orbit |
| Spacecraft properties | |
| Spacecraft type | ASTRO |
| Bus | ASTRO-E |
| Manufacturer | Toshiba |
| Launch mass | 1600 kg |
| Dimensions | 2 metres x 5 metres |
| Power | 500 watts |
| Start of mission | |
| Launch date | 10 February 2000, 01:30:00UTC |
| Rocket | M-V # 4 |
| Launch site | Kagoshima Space Center |
| End of mission | |
| Decay date | Failed to orbit |
| Orbital parameters | |
| Reference system | Geocentric orbit (planned) |
| Regime | Low Earth orbit |
| Perigee altitude | 550 km (340 mi) |
| Apogee altitude | 550 km (340 mi) |
| Inclination | 31.0° |
| Period | 96.0 minutes |
| Instruments | |
| X-ray Spectrometer (XRS) X-ray Imaging Spectrometer (XIS) Hard X-ray Detector (HXD) X-ray Telescope (XRT) | |
Suzaku (formerlyASTRO-EII) was anX-ray astronomy satellite developed jointly by theInstitute of Space and Aeronautical Science atJAXA andNASA'sGoddard Space Flight Center to probe high-energy X-ray sources, such assupernova explosions,black holes andgalactic clusters. It was launched on 10 July 2005 aboard theM-V launch vehicle on the M-V-6 mission. After its successful launch, the satellite was renamedSuzaku after the mythicalVermilion bird of the South.[4]
Just weeks after launch, on 29 July 2005, the first of a series of cooling system malfunctions occurred. These ultimately caused the entire reservoir ofliquid helium to boil off into space by 8 August 2005. This effectively shut down theX-ray Spectrometer-2 (XRS-2), 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 theHitomi X-ray satellite, launched in 2016, which also was lost weeks after launch. A Hitomi successor,XRISM, launched on 7 September 2023, with an X-ray Spectrometer (Resolve) onboard as the primary instrument.
On 26 August 2015, JAXA announced that communications withSuzaku had been intermittent since 1 June 2015 and that the resumption of scientific operations would take a lot of work to accomplish, given the spacecraft's condition.[5] Mission operators decided to complete the mission imminently, asSuzaku 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 onSuzaku to switch themselves off.[6][7]
Suzaku carried high spectroscopic resolution, very wide energy band instruments for detecting signals ranging from soft X-rays up togamma-rays (0.3–600keV). High-resolution spectroscopy and wide-band are essential factors in physically investigating high-energy astronomical phenomena, such asblack holes andsupernovas. One such feature, theK-line (x-ray), may be key to more direct imaging of black holes.
Suzaku discovered "fossil" light from a supernova remnant.[9]
Suzaku was a replacement forASTRO-E, which was lost in a launch failure. TheM-Vlaunch vehicle on the M-V-4 mission launched on 10 February 2000 at 01:30:00UTC. It experienced a failure of 1st stage engine nozzle 42 seconds into the launch, causing control system breakdown and underperformance.[10][11] Later stages could not compensate for underperformance, leaving payload in 250 miles (400 km) x 50 miles (80 km) orbit and subsequent reentry and crashed with its payload into theIndian Ocean.[12][13]
This article incorporates text from this source, which is in thepublic domain. This article incorporates text from this source, which is in thepublic domain. This article incorporates text from this source, which is in thepublic domain.| Operating |
| ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Planned | |||||||||||||
| Proposed | |||||||||||||
| Retired |
| ||||||||||||
| Hibernating (Mission completed) | |||||||||||||
| Lost/Failed | |||||||||||||
| Cancelled | |||||||||||||
| Related | |||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
| |||||||||||||||||||||
.png)