M 101 - Spiral Galaxy M101 (NGC 5457), type Sc, in Ursa Major

RA 14 : 03.2 (h:m); Declination +54 : 21 (deg:m); Distance 27 million light years;
Visual Brightness 7.9 (mag) ; Apparent Dimension 22.0 (arc min).

M101 was discovered by Pierre Méchain on March 27, 1781, and added as one of the last entries in Charles Messier's catalog. It was the first "spiral nebula" identified as such by William Parsons, the third Earl of Rosse.

Although extended 22 arc minutes on photos and quite bright, only the central region of this galaxy is visible in smaller telescopes, best at low powers.
On photographs, however, the Pinwheel Galaxy M101 is revealed as one of the most prominent Grand Design spirals in the sky.

Source and more: SEDS


January 30, 2009 23:12 - 00:22 UT.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with ATK16IC camera, Astronomik L filter.
7 unguided exposures of 600 seconds.

March 31, 2008 21:57 - 22:48 UT.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with ATK16IC camera, Astronomik L filter.
11 unguided exposures of 300 seconds.

March 10, 2007 23:31 - 00:03 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.
59 unguided exposures of 30 seconds

April 1, 2006 21:50 - 22:22 UT.
Imaged with LX200 10-inch f/10 telescope with 0.33 Focal Reducer operating at f/4.06 [focal length 1015mm], Vesta Pro-SC3a b/w RAW mode, Baader Infra Red Blocking Filter.
54 autoguided exposures of 40 seconds.

April 27, 2005 22:31 - 22:44 UT.
Imaging: TAL-2M 6-inch f/8 with focal reducer operating at f/4.6 [focal length 690mm], Vesta SC3a b/w RAW webcam, Baader Infra Red Blocking Filter, 13 unguided exposures of 30 seconds.

April 20, 2005 23:25 - 23:35 UT.
My first attempt at this object: it took me more than 30 minutes before I found it by using my star charts, setting circles and camera as I could not see it through my eye pieces.
Imaging: 200mm SLR Photolens and Vesta SC3a b/w RAW webcam; no filters.
36 unguided exposures of 15 seconds.