Geographic Location

Latitude: 44N 37.834' (44.63056 degrees N)
Longitude: 63W 34.811' (63.58018 degrees W)
Elevation: 100-metres
Time Zone: AST/ADT (UT-3 or 4 hours)
IAU Observatory Code: 851

Telescope Specifications

Our main telescope is a Planewave Model CDK24 with the following specifications:

Optical Design: Corrected Dall-Kirkham
Primary Mirror Diameter: 0.61-metres
Secondary Mirror Diameter: 287-mm
Effective Diameter: 0.54-metres (21.2")
Focal length: 3962-mm                
Focal ratio: 6.50
Brightness Ratio - scope to eye: 5909x

CCD Imaging

The camera is an Apogee CG-16M with AFW50-10S 10-position filter wheel.

Sensor: Truesense KAF-16803
Dark Current: 0.08 e- per second at 0C (2x2 binned)
A/D Converter: 16-bit
Full Well: 94,000 e-
Read Noise: 8.4 e- RMS
Gain: 1.5 e-/ADU
Pixel Size (binned 2x2): 18 microns
Resolution: 0.94 arcseconds
Image Size: 2048 x 2048 pixels
Field of View: 31.9 x 31.9 arc-minutes

Available Filters

Filter Name Model* Description
LUM (Luminance) Astrodon Luminance Luminance (includes Red, Green and Blue band passes)
RED (red) Astrodon Red Red for pretty-pictures
GRN (green) Astrodon Green Green for pretty-pictures
BLU (blue) Astrodon Blue Blue for pretty-pictures
B Astrodon B Photometric Johnson B
V Astrodon V Photometric Johnson V
R Astrodon R Photometric Cousins R
I Astrodon I Photometric Cousins I
OIII Astrodon OIII Narrowband (3nm) OIII line (501nm)
Ha Astrodon H-alpha Narrowband (3nm) H-Alpha line (656nm)
SII (not presently installed) Astrodon SII Narrowband (3nm) SII line (672nm)

*All filters are from Astrodon.

A simplified user's guide for ccd imaging at the BGO is here (updated September 2015).

Visual Observing

Theoretical Faintest Visual Stellar Detection: 16.35 magnitudes (no light pollution)
Actual Faintest Visual Stellar Detection:  14.2 magnitudes (observation of Pluto, Sept 2015)
Theoretical Resolution:
0.19 arc seconds (with perfect atmosphere)
Minimum Magnification: 122 using the 0.2x aperture rule
Maximum Magnification: 1219 using the 2x aperture rule

Eyepiece Used Focal Length
Apparent Field
Magnification True Field
Exit Pupil
Exit Pupil
Naglar 13 13 82 304.8 0.25 0.9 2.0
PanOptic 41 41 68 96.6 0.67 3.0 6.3
Ethos 21 21 100 188.7 0.52 1.5 3.2

All Sky Charts

All Sky Charts for each month of the year, needed for an ASTR1001 project, are here (as a pdf).

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