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'''OAO-2 ''Stargazer''''' (Orbiting Astronomical Observatory 2) was a space observatory launched on December 7, 1968, with the nickname ''Stargazer''.<ref name=joseph>[http://books.google.com/books?id=y8BMepjeciEC&pg=PA20&lpg=PA20&dq=stargazer+oao-2&source=bl&ots=_48qTuQ3NN&sig=tbYK9Cxs6AnDsIBT3rwZydykQYg&hl=en&sa=X&ei=TUpYUverJIen4AO5uoCABw&ved=0CEIQ6AEwAw#v=onepage&q=stargazer%20oao-2&f=false Joseph A. Angelo - Spacecraft for Astronomy (2009) - Page 20] (Google Books)</ref>
'''OAO-2 ''Stargazer''''' (Orbiting Astronomical Observatory 2) was a space observatory launched on December 7, 1968, with the nickname ''Stargazer''.<ref name=joseph>[http://books.google.com/books?id=y8BMepjeciEC&pg=PA20&lpg=PA20&dq=stargazer+oao-2&source=bl&ots=_48qTuQ3NN&sig=tbYK9Cxs6AnDsIBT3rwZydykQYg&hl=en&sa=X&ei=TUpYUverJIen4AO5uoCABw&ved=0CEIQ6AEwAw#v=onepage&q=stargazer%20oao-2&f=false Joseph A. Angelo - Spacecraft for Astronomy (2009) - Page 20] (Google Books)</ref>
An [[Atlas-Centaur]] launched it into a nearly circular 750&nbsp;km altitude Earth orbit.<ref>[http://space.skyrocket.de/doc_sdat/oao-2.htm Gunter - OAO-2]</ref> Data was collected in ultraviolet on many sources including comets, planets, and galaxies.<ref name=joseph/><ref name=o2/> It had two major instrument sets facing in opposite directions; the Smithsonian Astrophysical Observatory (SAO) and the Wisconsin Experiment Package (WEP).<ref name=o2>[http://www.sal.wisc.edu/~meade/OAO/ Orbiting Astronomical Observatory OAO-2]</ref> One discovery was large halos of hydrogen gas around comets,<ref name=o2/> and it also observed [[Nova Serpentis]].<ref name=joseph/>
An Atlas-Centaur rocket launched it into a nearly circular 750&nbsp;km altitude Earth orbit.<ref>[http://space.skyrocket.de/doc_sdat/oao-2.htm Gunter - OAO-2]</ref> Data was collected in ultraviolet on many sources including comets, planets, and galaxies.<ref name=joseph/><ref name=o2/> It had two major instrument sets facing in opposite directions; the Smithsonian Astrophysical Observatory (SAO) and the Wisconsin Experiment Package (WEP).<ref name=o2>[http://www.sal.wisc.edu/~meade/OAO/ Orbiting Astronomical Observatory OAO-2]</ref> One discovery was large halos of hydrogen gas around comets,<ref name=o2/> and it also observed [[Nova Serpentis]].<ref name=joseph/>


The Smithsonian Astrophysical Observatory, also called Celescope, had four 12 inch Schwarzschild telescopes that fed into Uvicons.<ref name=sao>[http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1968-110A-01 High-Resolution Telescopes]</ref> Various filters, photocathodes, and electronics aided in collecting data in several ultraviolet light passbands.<ref name=sao/> The experiment was completed in April 1970.<ref name=sao/> By the time it finished about 10 percent of the sky was observed.<ref name=sao/>
The Smithsonian Astrophysical Observatory, also called Celescope, had four 12 inch Schwarzschild telescopes that fed into Uvicons.<ref name=sao>[http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1968-110A-01 High-Resolution Telescopes]</ref> Various filters, photocathodes, and electronics aided in collecting data in several ultraviolet light passbands.<ref name=sao/> The experiment was completed in April 1970.<ref name=sao/> By the time it finished about 10 percent of the sky was observed.<ref name=sao/>
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The Wisconsin Experiment Package had eleven different telescopes for ultraviolet observations.<ref name=wep>[http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1968-110A-02 Wisconsin Experiment Package]</ref> For example, there was a photoelectric photometer fed by a 16 inch telescope with a six-position filter wheel.<ref name=wep/> WEP observed over 1200 targets in ultraviolet light before the mission ended in early 1973.<ref name=o2/>
The Wisconsin Experiment Package had eleven different telescopes for ultraviolet observations.<ref name=wep>[http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1968-110A-02 Wisconsin Experiment Package]</ref> For example, there was a photoelectric photometer fed by a 16 inch telescope with a six-position filter wheel.<ref name=wep/> WEP observed over 1200 targets in ultraviolet light before the mission ended in early 1973.<ref name=o2/>


{{-}}
==See also==
==See also==
{{Portal|Spaceflight}}
⚫
*[[Orbiting Astronomical Observatory]]
*[[Orbiting Solar Observatory]]
* [[Orbiting Astronomical Observatory]]
⚫
* [[Orbiting Solar Observatory]]


{{-}}
==References==
==References==
{{reflist}}
{{reflist}}


==External links==
==External links==
*[http://adsabs.harvard.edu/abs/1978ApJ...223..185M OAO 2 observations of the Alpha Persei cluster]
* [http://adsabs.harvard.edu/abs/1978ApJ...223..185M OAO 2 observations of the Alpha Persei cluster]


{{Space observatories}}
{{Space observatories}}
{{Orbital launches in 1968}}


[[Category:Ultraviolet telescopes]]
[[Category:Ultraviolet telescopes]]

Revision as of 19:38, 24 January 2014

Orbiting Astronomical Observatory 2
Mission typeAstronomy
OperatorNASA
COSPAR ID1968-110A Edit this at Wikidata
SATCAT no.3597
Spacecraft properties
ManufacturerGrumman
Dry mass2,012 kilograms (4,436 lb)
Start of mission
Launch date7 December 1968, 08:40:09 (1968-12-07UTC08:40:09) UTC
RocketAtlas SLV-3C Centaur-D
Launch siteCape Canaveral LC-36B
End of mission
Last contactJanuary 1973 (1973-02)
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude768 kilometres (477 mi)
Apogee altitude777 kilometres (483 mi)
Inclination35.0 degrees
Period100.30 minutes
Epoch6 January 1969[1]
 

OAO-2 Stargazer (Orbiting Astronomical Observatory 2) was a space observatory launched on December 7, 1968, with the nickname Stargazer.[2] An Atlas-Centaur rocket launched it into a nearly circular 750 km altitude Earth orbit.[3] Data was collected in ultraviolet on many sources including comets, planets, and galaxies.[2][4] It had two major instrument sets facing in opposite directions; the Smithsonian Astrophysical Observatory (SAO) and the Wisconsin Experiment Package (WEP).[4] One discovery was large halos of hydrogen gas around comets,[4] and it also observed Nova Serpentis.[2]

The Smithsonian Astrophysical Observatory, also called Celescope, had four 12 inch Schwarzschild telescopes that fed into Uvicons.[5] Various filters, photocathodes, and electronics aided in collecting data in several ultraviolet light passbands.[5] The experiment was completed in April 1970.[5] By the time it finished about 10 percent of the sky was observed.[5]

The Wisconsin Experiment Package had eleven different telescopes for ultraviolet observations.[6] For example, there was a photoelectric photometer fed by a 16 inch telescope with a six-position filter wheel.[6] WEP observed over 1200 targets in ultraviolet light before the mission ended in early 1973.[4]

See also

References

  1. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 12 October 2013.
  2. ^ a b c Joseph A. Angelo - Spacecraft for Astronomy (2009) - Page 20 (Google Books)
  3. ^ Gunter - OAO-2
  4. ^ a b c d Orbiting Astronomical Observatory OAO-2
  5. ^ a b c d High-Resolution Telescopes
  6. ^ a b Wisconsin Experiment Package

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Orbiting_Astronomical_Observatory_2&oldid=592217593"