The Double Cluster

17:40 18/10/2006 UTC

I had a short window of opportunity for imaging and I thought I image Double Cluster with my new scope. As in last time when I imaged this, polar alignment was way off again. I could only do 90s subs because excess drifting. Short exposures ain't so bad with this target so I decided not to fix the alignment. Update August 2009: I reprocessed this image using Nebulosity and Photoshop.

NGC/IC Object List:
NGC869 open cluster RA:02h19m03.7 Dec:+57°08m'06" BMag: , OCL 350 H Persei, Double Cluster
NGC884 open cluster RA:02h22m32.0 Dec:+57°08m'39" BMag: , OCL 353 Chi Persei, Double Cluster

[High Resolution : 3089x2211 @ 2.76 arcsec/pixel]

Camera: Modified Canon EOS 350D | Telescope: Skywatcher ED80 Pro 80mm f7.5 refractor, William Optics 0.8x focal reducer | Mount: Orion Skyview Pro, Boxdoerfer PowerFlex MTS-3SLP drive controller | Filters: Baader IR/UV block | Guiding: Orion ShortTube 80mm f5 refractor, QCGuider, Teleskop-Service 1.5x Barlow, Phillips ToUCam Pro II webcam | Exposure: 30x90s (45m) ISO800 f6, 5 darks, 10 flats, bias | Software: Stark-Labs Nebulosity 2, Adobe Photoshop CS4 | Location: 60°31'N 26°52'E (Koivula/Kotka,FI) | Image Field: 2.375 x 1.697 degrees | Image Center: Ra 02h20m26s Dec +57°10'47" | Target altitude in the beginning of the exposure 52°