Launch Success
Liftoff Time (GMT)
01:20:00
Friday November 17, 1995
Flight V80.
The Infrared Space Observatory (ISO) was a space telescope for infrared light designed and operated by the European Space Agency (ESA), in cooperation with ISAS (part of JAXA as of 2003) and NASA. The ISO was designed to study infrared light at wavelengths of 2.5 to 240 micrometres. The €480.1-million satellite was launched on 17 November 1995 from the ELA-2 launch pad at the Guiana Space Centre near Kourou in French Guiana. The launch vehicle, an Ariane 44P rocket, placed ISO successfully into a highly elliptical geocentric orbit, completing one revolution around the Earth every 24 hours. The primary mirror of its Ritchey-Chrétien telescope measured 60 cm in diameter and was cooled to 1.7 kelvins by means of superfluid helium. The ISO satellite contained four instruments that allowed for imaging and photometry from 2.5 to 240 micrometres and spectroscopy from 2.5 to 196.8 micrometers.
Highly Elliptical Orbit
1 Payload
2,498 kilograms
Manufacturer
ESARocket
Diameter: 3.8m
Height: 58.72m
Payload to Orbit
GTO: 3,460 kg
Liftoff Thrust
4,334 Kilonewtons
Stages
3
Strap-ons
4
52nd
Mission
10th
Mission of 1995
71st
Mission
10th
Mission of 1995
68th
Orbital launch attempt