“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
Quote:Good idea Pete. Right now I have a little 50mm fan at the back of my 10" dob and I don't run it during observing because of vibration. The 120mm fan will move much more air and do it with less vibration.
Quote:Today spent some time in my darkened basement with an artificial star so I could rotate my crown to find the point of least astigmatism in my achromat.Tonight was above average seeing for Michigan. I used a 9mm K eyepiece in my 4" scope. E was usually there and definitely confirmed with less than one minute of observation. CF sure looked elongated, but after ten minutes of staring I was without definitive separation let alone confirmation.I know this is brought up every year but it is bothering me more this year than in the past. Who gave the stars the wrong lettering? Isn't the brightest one supposed to be the A? ugh. Always some exception to the rule.
Used acronyms: NEML=Naked Eye Magnitude Limit, SQM=Sky Quality Meter, TML=Telescope Magnitude Limit, CO=Central Obstruction, delta_m=difference in magnitudes between double star components, RoT=Rule of Thumb, pD_mm=proposed D_mm for resolving a binary (ident with earlier used pA=proposed Aperture), D_mm=Diameter (of scope) in mm, UCAC4=USNO CCD Astrograph Catalog 4th edition