Everything about The Samuel Oschin Telescope totally explained
The
Samuel Oschin telescope is a 48-inch (1.22-m) aperture
Schmidt camera at the
Palomar Observatory in northern
San Diego County,
California. It consists of a 49.75-inch
Schmidt corrector plate and a 72-inch (f/2.5) mirror. The instrument is strictly a camera; there's no provision for an eyepiece to look through it. It originally used 10 and 14-inch glass
photographic plates. Since the focal plane is curved, these plates had to be preformed in a special jig before being loaded into the camera.
Construction on the Schmidt telescope began in 1939 and it was completed in 1948.
The camera has been converted to use a
CCD imager. This is a mosaic of 112 CCDs covering the whole (4 degree by 4 degree)
field of view of the camera, the largest CCD mosaic used in an astronomical camera at this time. The corrector plate was recently replaced using glass that's transparent to a wider range of wavelengths. The camera was originally hand-guided through one of two 10-inch
refracting telescopes mounted on either side of the camera. The camera is now fully automated and remote-controlled. The data collected is transmitted over the
High Performance Wireless Research and Education Network (HPWREN). It is programmed and operated primarily from
Pasadena, California with no operator on-site (except to open and close the dome).
The plate archive
About half of the large photographic glass plate negatives exposed on the telescope, some 19,000 in all, had been accumulating in the sub-basement of the Robinson building at the
California Institute of Technology since
1949. In
2002, astronomer
Jean Mueller approached
Richard Ellis, the director of the
Caltech Optical Observatories, to volunteer to the task of organizing the Oschin Telescope plate archive. Given the go-ahead, she recruited eleven volunteers from the
Mount Wilson Observatory Association (MWOA) and the
Los Angeles Astronomical Society (LAAS), and the team then spent 13 weekends (more than one thousand hours) poring over the stacks, placing plates in protective sleeves, and packing them in more than 500 boxes that were transported to Palomar.
All of the volunteers were presented with the gift of having
asteroids named after them, compliments of
Carolyn S. Shoemaker:
10028 Bonus,
12680 Bogdanovich,
13914 Galegant,
16452 Goldfinger,
19173 Virginiaterése,
20007 Marybrown,
21148 Billramsey,
22294 Simmons,
27706 Strogen, and
29133 Vargas. Mueller was also rewarded by a visit to the
Keck Observatory in
Hawaii.
Discoveries
The Oschin Telescope was responsible for the discovery of
90377 Sedna on
2003-11-14 and
Eris, the "10th Planet" on
2005-01-05 from images taken
2003-10-21.
Further Information
Get more info on 'Samuel Oschin Telescope'.
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