This article is about X-ray telescope. For gravitational wave detector, see Einstein Telescope.
This article contains orbital elements but does not include an epoch, or date when those elements, which typically vary over time, were correct. Please help by adding the epoch for the current data, or changing the orbital elements to ones with a known epoch.
Einstein Observatory (HEAO-2) was the first fully imaging X-raytelescope put into space and the second of NASA's three High Energy Astrophysical Observatories. Named HEAO B before launch, the observatory's name was changed to honor Albert Einstein upon its successfully attaining orbit.
The Einstein Observatory, HEAO-2, was launched on November 13, 1978, from Cape Canaveral, Florida, on an Atlas-Centaur SLV-3D booster rocket into a near-circular orbit with an initial altitude slightly above 500 km. Its orbital inclination orbit was 23.5 degrees
The Einstein Observatory carried a single large grazing-incidence focusing X-ray telescope that provided unprecedented levels of sensitivity (hundreds of times better than previously achieved) and arc-second angular resolution of point sources and extended objects. It had instruments sensitive in the 0.2 to 3.5 keV energy range. A collection of four focal-plane instruments was installed in the satellite:
HRI, or High Resolution Imaging camera, 0.15-3 keV
IPC, or Imaging Proportional Counter, 0.4 to 4 keV
SSS, or Solid State Spectrometer, 0.5 to 4.5 keV
FPCS, or Bragg Focal Plane Crystal Spectrometer
MPC, Monitor Proportional Counter, 1-20 keV
BBFS, Broad Band Filter Spectrometer
OGS, Objective grating spectrometer
The Einstein Observatory satellite re-entered the Earth's atmosphere and burned up on March 25, 1982.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).
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