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OAO 3 (COPERNICUS)

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OAO 3 (COPERNICUS) is classified as:


NORAD ID: 6153
Int'l Code: 1972-065A
Perigee: 702.4 km
Apogee: 711.8 km
Inclination: 35.0 °
Period: 98.8 minutes
Semi major axis: 7078 km
RCS: 6.8136 m2 (large)
Launch date: August 21, 1972
Source: United States (US)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)

This mission was the third in the OAO program and its second successful spacecraft to observe the celestial sphere from above the Earth's atmosphere. A UV telescope with a spectrometer measured high-resolution spectra of stars, galaxies, and planets with the main emphasis on the determination of interstellar absorption lines. Three X-ray telescopes and a collimated proportional counter provided measurements of celestial X-ray sources and interstellar absorption between 1 and 100 A.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE): 
1  6153U 72065A   19022.16222605  .00000018  00000-0  83547-5 0  9994
2  6153  35.0081 334.8023 0006662 156.2634 289.1895 14.57899139466154
Source of the keplerian elements: AFSPC