M 67 - Open Cluster (NGC 2682), type 'f', in Cancer

RA 08:50.4 (h:m); DEC +11:49 (deg:m); Distance 2700 light years
Visual Brightness 6.1 (mag); Apparent Dimension 30.0 (arc min)

M67 is one of the oldest known open clusters, and by far the oldest of Messier's open clusters.
As M67 is of an age of the same order of magnitude as our Solar System, and its stars happen to have a similar chemical composition as the Sun, this cluster is an appropriate target of observation for the study of solar-type stars.

Source and more: SEDS


February 26, 2008 21:11- 22:04 UT.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with 5 cm extender, Astronomik LRGB filters; ATK16IC b/w camera.
Exposures: Lum 8x240s [1x1; RGB 5x60s [2x2].

March 25, 2007 19:34 - 19:59 and March 26, 2007 19:46 - 20:16 UT.
My first LLRGB image: I combined the 210 seconds luminosity layer of March 25, 2007 with the 30 seconds LRGB image of March 26, 2007.
I determined the rotation between the images with Astrowave and then applied the exact rotation in Photoshop and layered.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with 10 cm extender, Astronomik LRGB filters; ATK16IC b/w camera, K3CCDTools.
Exposures: Luminosity 5x210 seconds plus 18x30 seconds; RGB 10x30 seconds.

March 26, 2007 19:46 - 20:16 UT.
My second LRGB image; once more I selected M67 because it contains a G2V star: nice to calibrate my filters.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with 10 cm extender, Astronomik LRGB filters; ATK16IC b/w camera, K3CCDTools.
Exposures: Luminosity 18x30 seconds; RGB 10x30 seconds; autoguided.

March 25, 2007 19:31 - 20:32 UT.
First Light for my ATK16IC and also my first LRGB image.
I selected M67 because it contains a G2V star: nice to calibrate my filters.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with 10 cm extender, Astronomik LRGB filters; ATK16IC b/w camera, K3CCDTools.
Exposures: Luminosity 5x210 seconds; RGB 5x100 seconds; all unguided.

March 19, 2007 19:34 - 19:43 UT.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with diagonal, Baader Infra Red Blocking Filter; SC3a b/w RAW camera.
35 unguided exposures of 15 c.q. 40 seconds

March 8, 2007 21:23 - 21:29 UT.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with diagonal, Baader Infra Red Blocking Filter; SC3a b/w RAW camera.

February 23, 2004 21:05 - 21:12 UT.

March 18, 2003 20:22 - 20:35 UT.