The MSU 24" Telescope Technical Summary.

Building Location:

42D 42M 23S North
05H 37M 56S West
866FT above sea level
896FT above sea level (Telescope elevation)


Telescope Manufacturer:

Boller and Chivens Division, Perkin-Elmer Corporation:

Guide telescope:

Aperature: 6"
Focal Ratio: f/15
Focal length: 90 inches
Faintest Visible Magnitude: 12.7
Theoretical Resolving Power: 0.76 arcsec


	12mm eyepiece	24mm eyepiece
Magnification	190x	95x
Field of view	13'	26'

Primary Mirror:

Aperature: 24" (clear aperature)
Focal Ratio: f/3.0 paraboloid
Optical Material: Cer-Vit
Focal length: 72 inches
Faintest Visible Magnitude: 15.7
Theoretical Resolving Power: 0.19 arcsec

Seconday Mirrors:


	#1 Cassegrain	#2 Cassegrain	coude
Focal Ratio	f/13.5	f/8.0	f/34.6
Effective focal lenght	324"	192"	830"
Field diameter	31.8 arc min	60.0 arc min	24.9 arc min
Approx. magnification with Erfle eyepiece	295x	175x
Approx. field of view with Erfle eyepiece	17'	28'
Field Flattener	No	Yes	No
2nd Mirror Aperature	6.07"	9.14"	8.50"
2nd Mirror Focal Length	-21.39"	-39.91"	27.32"
Angular Diameter of 5" plate in focal plane	-21.39"	-39.91"	27.32"
Plate scale	25.1 "/mm	42.3 "/mm	09.8 "/mm

Focusing:

Electronic drive at secondary mirror

Optical quality:

80% of the light from an on-axis point source will image within a circle .5 arc seconds in diameter at any of three foci.

Mirror coating:

Aluminized with a magnesium flouride overcoat.

Finder:

6" f/15 with projection reticle

Optical configurations:

f/13.5 Cassegrain

f/8 Cassegrain

f/34.6 coude

Type of Mount:

Equatorial off-axis

Telescope weight:

6000 pounds

Slew drive rate:

4 degrees per second

Guide and set drive rate:

Servo controlled variable

Tracking drive gear:

3" diameter, 360 teeth

Tracking accuracy:

2 arc seconds per 5 minutes of time
5 arc seconds per one hour of time

Position setting accuracy:

RA: .01 minutes of time
Dec: .1 minutes of arc