JWST Facts
Proposed Launch Date: August 2011
Proposed Launch Vehicle: Several possibilities exist
Mission Duration: 5 - 10 years
Total payload mass: Approx 6200 kg, including observatory, on-orbit consumables and launch vehicle adaptor.
Diameter of primary Mirror: ~6.5 m (21.3 ft)
Clear aperture of primary Mirror: 25 m2
Primary mirror material: beryllium
Mass of primary mirror: about one-third as much as Hubble's
Focal length: TBD
Number of primary mirror segments: 18
Optical resolution: ~0.1 arc-seconds
Wavelength coverage: 0.6 - 28 microns
Size of sun shield: ~22 m x 10 m (72 ft x 33 ft)
Orbit: 1.5 million km from Earth at L2 Point
Operating Temperature: < 50 K (-370 °F)
Facts from Nasa.
MIRI Facts
Operating Wavelengths: 5 - 27 µm
Coronagraphic Wavelengths: 10.65, 11.4, 15.5, 23 µm
Spectroscopic Wavelengths: 5 - 10 µm
Field of view: 1.3’ x 1.7’
Weight of MIRI: 103 kg
Operational temperature: 7k
Expected MIRI Sensitivity (all 10 σ ; 10,000 sec):
| 5.6µm | 0.19µJy |
| 12.8µm | 1.4µJy |
| 25.5µm | 29µJy |
| 6.4µm spec. | 1.2 X 10-20 W m-2 |
| 22.5µm spec. | 5.6 X 10-20 W m-2 |