Moon-Venus-M45 Conjunction (June 23, 2006)

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On July 23, 2006, the Moon, the planet Venus, and the large and famous open cluster M45 (The Pleiades) appeared in the morning sky about a half hour before the Sun rose. I captured it (not very well) with a 104 mm (166 mm equivalent) lens.

Object Conjunction Between Moon, Venus, and M45
Common Name Conjunction Between Moon, Venus, and the Pleiades
Date, Time, & Moon June 23, 2006 @ 4:30 AM; 6% Moon
Location SBO Telescope at CU Boulder
Optics 104 mm; f/5.4 camera lens
Camera Canon Digital Rebel 350D XT
Exposure Time Base: 5.5 minutes; 11 30-second frames stacked; ISO 100
Diffraction Spikes: 1.5 minutes; 3 30-second frames stacked; ISO 100
Optical Correction No Dark-Correction; 2-D polynomial flatframe corrections
Camera Position Clock Drive Mount
Guiding Passive Clock Drive
Processing Details IDL - Flatframe correction and image addition
PhotoShop CS - Alignment, Levels Adjustment, Unsharp Mask, and Gaussian Blur
Magnitude Depth Complete to 8.5th.
Field of View approx. 17.0° by 11.3°
Notes Unfortunately, this conjunction became visible just a few minutes before a very long twilight. Over the course of the 10 minutes that I took the images used for this, the recorded light level on the camera more than doubled. While this was processed out in flatfield corrections and normalization to a standard luminosity, it meant that I couldn't take long exposures (maxed at 30 seconds), otherwise the sky would overpower the objects.