In the middle of a two-minute exposure of the Pleiades (M45) and I'm watching this commercial airplane moving across the sky. I'm thinking that guy might show up in the frame...he goes right through the Pleiades in the center--solid white line in the shot are the wingtip lights, blinking red is the bottom beacon.

To make matters worse it's cold as hell with way too much humidity--dew all over the lenses--to be out for long tonight. I was hoping for a crisp clear one, but...the stars just weren't right. I did get to play around with the autoguiding set up--ZWO ASI120MM-S CCD camera and William Optics 50mm guide scope. I'm using PHD under OSX (handling the autoguiding), and DigiCamControl controlling the Nikon D750 running in Windows7 (in the VM). Autoguiding is a way to keep the telescope mount pinned to a specific piece of the sky--a camera continuously shoots the sky, software uses a selected star to make continuous tiny adjustments to the telescope mount to keep it where you want. In theory it should allow you to take much longer exposures.
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