Lowell Logo

1.8-Meter Perkins Telescope

gr/72inch.jpg

The 1.8-m (72") Perkins telescope

Lowell Observatory's 1.8-meter Perkins Telescope was purchased from Ohio Wesleyan University in 1998. Since 1998, the telescope has been operated in partnership with the Boston University Department of Astronomy with the observing time shared equally between Lowell and BU. The telescope was moved from the Perkins Observatory near Delaware, Ohio to its current location on Anderson Mesa in 1961 and operated by Lowell Observatory until 1998 in partnership with the Ohio State University and Ohio Wesleyan. The telescope has a Cassegrain optical system and a German equatorial mounting. The telescope and associated instrumentation are operated from a convenienty located control room.

Lowell-BU partnership

The Perkins telescope is operated in collaboration with the Boston University Department of Astronomy. Lowell and BU have formed a partnership for the joint operation of this telescope. For details on available instruments, click the links in the sidebar at right.

Visiting Observers

A total of 60 nights per year are being made available to visiting observers in recognition of recent NSF PREST grants to Lowell and BU in support of various improvements to the Perkins facility. Further information about the visiting observer policy, program contacts, and the NSF PREST program can be found here.


Lowell Telescope Specification chart

Perkins 72" Hall 42" LONEOS 31" 21"
Longitude 111° 32' 09.3" 111° 32' 07.9" 111° 32.2' 111° 32' 09.0" 111° 39' 59.2"
Latitude +35° 05' 48.6" +35° 05' 48.3" +35° 05.8' +35° 05' 54.6" +35° 12' 10.4"
Altitude 7236ft. (2206m) 7236ft. (2206m) 7236ft. (2206m) 7243ft. (2208m) 7260ft. (2213m)
Dp 72" (1.8m) 41" (1.04m) * 31/29.5" (0.79/0.75m) 20.78 (0.53m)
F/# 17.5 8.06 * 15 15.9
EFI 1256.5" (31.93m) 330.39" (8.392m) * 464" (11.78m) 332.5" (8.44m)
Scale ("/mm) 6.45 24.58 * 17.5 24.3
BFI 51.5" (1.30m) 29.9" (0.759m) * 25" (0.63m) 20" (0.51m)
Fp/# 4.18 4.05 * 5.0 3.4
FLp 300.6" (7.635m) 166.06" (4.218m) * 155" (3.94m) 70.0" (1.77m)
Dsa 16.3" (0.41m) 16.6" (0.422m) * 9.0" (0.22m) 4.6" (0.12m)
Is 284.1" (7.22m) 130.43" (3.313m) * 134.9" (3.43m) 72.7" (1.85m)
Os 68.0" (1.72m) 65.51" (1.664m) * 45.1" (1.14m) 15.3" (0.39m)
Ms 232.6" (5.91m) 100.56" (2.554m) * 109.9" (2.79m) 54.7" (1.39m)
mag 4.2 1.990 * 3.0 4.7
K1 -1.0 -1.306 * -1.00 -1.00
K2 -3.65 -14.945 * -5.01 -3.35

1) Longitude and latitude are good to about 0.2.
2) The altitudes are good to about 1 meter.
4) The Hall F/8 is a Ritchey-Chretien telescope.
5) The 31inch primary if F/5. However, it is stopped down to 29.5 inches.
6) Only the Hall F/8 has a known optimum back focal distance.
7) The conic constant is defined such that 0 is a circle and -1 is a parabola.
8) Dsa is the diameter of the axial cone at the secondary. The diameter of the secondary is 1 to 2 inches larger than Dsa.

© 2010 LOWELL OBSERVATORY    1400 West Mars Hill Road    Flagstaff, AZ 86001     (928) 774-3358
Research | DCT | NPOI | VIsit Lowell | Join Lowell | Media Room | Our team | Employment ]
[ Internal pages | Library | Lowell Predoctoral Program ]