Sunday, October 28, 2007

Chasing a cometary visitor

On October 24th, Comet 17P/Holmes brightened suddenly from magnitude 17 to magnitude 2.5. Saturday night was clear in north Texas so I decided to try getting a picture of the comet. I set up my Televue NP 101 with my ST-237 camera using a flip mirror arrangement to center the image on the sensor. You can see the nucleus of the comet and the dusty halo surrounding it.

I am going to have to experiment some with the Meade Flip Mirror to get the camera and eyepiece at focus at the same time. I'll probably need to get a small extender to move the camera back about 1/4 of an inch to get both the eyepiece and camera into focus at the same time. The helical focuser on the flip mirror does not have enough inward travel to accommodate the eyepiece when the camera is in focus.