The 31-inch (79 cm.) Tinsley reflector is located on Fan Mountain. The telescope is a general use reflector originally used with photomultipliers and a photographic plate spectrograph. Currenty extensive hardware upgrades and instrumentation efforts are underway to transform the observatory into a more modern research facility capable of IR imaging and grism spectroscopy. This upgrade and instrument project is funded through an NSF grant. Projects in the upgrade include: a drive system upgrade, a new IR Carmera, and an autoguider.
Due to the status of this upgrade project the 31-inch will only be avaialable for public nights, twice a year. For more information about the project or use of the telescope please contact Michael Skrutskie (firstname.lastname@example.org)
The 31-inch (79 cm.) Tinsley reflector is located on Fan Mountain. Here is some information about the telescope.
|Primary||31 inches in diameter, 120-inch focal length, 6.25 inches thick,|
|wt. = 368.8 lbs., the hole is 8.75 inches in diameter. All|
|mirrors are Pyrex.|
|4X Secondary||8.48 inches in diameter, 1.75 inches thick. System focal length|
|480 inches. f/16|
|8X Secondary||5.474 inches in diameter, 0.875 inches thick. System focal|
|length 960 inches. f/32|
|Plate scale||16.9 arcsec/mm (calculated). Measured value = 16.2 (Zissel)|
|to 17.5 (Rosenberg) arcsec/mm.|
|Limiting visual magnitude||Estimated at approximately 16 mag. on the best nights.|
|Dome||24 ft. Observa-dome.|
|25 mm. + Xfer system||2.75'||960X|