6 November 2007

Observing Location	MO
Observational Period	1915-2100 EST
Atmospheric Conditions	Cloud Cover Clear Temperature 47° - 45° F Wind Calm to Light Breeze Humidity Moderate Feels Like Cold I had my fingerless gloves on and my fingertips were getting very cold. But the aire is stable. The light-pollution here is terrible. Transparency Good Seeing I
Instruments	Golden Gate 7x35 binocular - Charlie SAR: Coulter CT-100 Newtonian reflector - Charlie Celestron Omni 20mm (21x) Celestron Omni 2x Barlow
Observing Party	Charlie Ridgway

Target 17P/Holmes Constellation Per Category Comet Time yyyymmdd.hhmm 20071106.1925 EST Comments I can see the comet again but it is fetting faint. Object Mag. Description α Per 1.79 brighter β Per 2.09 brighter ζ Per 2.84 brighter 17P/Holmes ~2.87   Ε Per 2.90 equal γ Per 2.91 dimmer η Per 3.77 dimmer τ Per 3.93 dimmer 48 Per 3.96 dimmer ι Per 4.06 dimmer μ Per 4.12 dimmer λ Per 4.25 dimmer HIP 20070 4.60 dimmer 34 Per 4.67 dimmer HIP 16147 4.99 dimmer HIP 16210 5.58 dimmer HIP 15779 5.32 dimmer ψ Per 4.32 dimmer σ Per 4.36 dimmer HIP 18396 5.39 dimmer I had a lot of trouble finding the comet in the Barlow. It is getting to be too faint to see it with all the glare of the lights here. I eventually got a count of the number of comets that would fit across the field of view. But the difference between the low power and high power size is more than I would like. I have still averaged them to come up with my final assessment. Magnification Fov Count Diameter 21.6x 2.3° 6.5 0.35° 21.23' 21'14" 43.2x ~1° 3.5 0.29° 17.14' 17'09" Average 0.32° 19.2' 19"12" CNN is a little late, but they are reporting the naked-eye comet today.

Target Stock 2 Constellation Per Category DSO: OCl Time yyyymmdd.hhmm 20071106.2010 EST Comments A large area ringed by bright stars and filled with many faint stars. ~1° in diameter.

Target C14, Double Cluster, NGC 869/884 Constellation Per Category DSO: OCl Time yyyymmdd.hhmm 20071106.2012 EST Comments As large overall as Stock 2. The circular cluster is very evident, the other less so.

Target NGC 1499, California Nebula Constellation Per Category DSO: Neb Time yyyymmdd.hhmm 20071106.2030 EST Comments Not Seen

Target Wilhelm Struve 425 Constellation Per Category Double Star Time yyyymmdd.hhmm 20071106.2035 EST Comments I realized when I got home that I had misread my map in the field and was looking at ο Per, which is also a double; and that Σ 425 is a much fainter star to the ENE. I thought I saw a faint secondary at 3:30-4:00 but that is the direction that the comet tails point in SAR so I can’t be sure.