NGC206

Constellation: Andromeda

NGC 206 is a vast starcloud in the Andromeda (M31) galaxy, roughly 2.5-3 million light years away. NGC 206 is one of the largest star forming regions known in our local group of galaxies. Studying Cepheid variable stars in NGC 206 can provide a way to accurately measure the distance to the cluster and the Andromeda galaxy. That way we may also have a proper scale for the universe as such.

See also this APOD image for reference.

	November 08 and 09, 2007 C8 @ F6, Artemis 285 November 08: 7x720s 1x1 (IRB-filter) November 09: 5x720s 1x1 (IRB-filter) 9x240s 2x2 (R-filter) 7x240s 2x2 (G-filter) 10x240s 2x2 (B-filter) Click image for large version. Same image as below, but two green channel frames have been removed because of poor star shapes, causing green "tears" on some bright stars.
	November 08 and 09, 2007 C8 @ F6, Artemis 285 November 08: 7x720s 1x1 (IRB-filter) November 09: 5x720s 1x1 (IRB-filter) 9x240s 2x2 (R-filter) 9x240s 2x2 (G-filter) 10x240s 2x2 (B-filter) Click image for large version. Capture: ArtemisCapture Autoguiding: wxAstroCapture (FS60c) Calibration: ImageTOOLSca Stacking: ImageTOOLSca LRGB: IRIS 5.51 and Photoshop CS2
	November 08, 2007 C8 @ F6, Artemis 285 7x720s 1x1 (IRB-filter) Click image for large, uncropped version. Capture: ArtemisCapture Autoguiding: wxAstroCapture (FS60c) Calibration: ImageTOOLSca Stacking: ImageTOOLSca This was an excercise in guiding with wxAstroCapture, using new autocalibration features. The guider image scale was approcimately 4.6 arcsec/pixel, while the imager image scale is 1.0 arcsec/pixel. That implies I needed a guiding precision of about 0.1-0.2 pixels over 12 minutes to get decent round stars.... I was using the File Interface towards MTSca Pro. In the future i will use a more direct approach.