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Faint Object Spectrograph


Date: 28 February 1997
Copyright: ESA/NASA

The Faint Object Spectrograph (FOS) was exchanged with STIS during the Second Servicing Mission and brought back to Earth. The FOS had two modes of operation - low resolution and high resolution. In low resolution mode it reached 26th magnitude in one hour with a resolving power of 250. At high resolution, the FOS reached only 22nd magnitude in an hour, but the resolving power was increased to 0.9 Angstroms at 1200 Angstroms.
Last Update: 1 September 2019
12-Mar-2026 14:21 UT

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