M 82 Irregular Galaxy M82 (NGC 3034), type Ir-II, in Ursa Major - Cigar Galaxy

RA 09 : 55.8 (h:m); DEC +69 : 41 (deg:m); Distance 12 million light years;
Visual Brightness 8.4 (mag); Apparent Dimension 9x4 (arc min)

Forming a most conspicuous physical pair with its neighbor, M81 (THE showpiece galaxies for many Northern hemispherers), this galaxy is the prototype of an irregular of the second type, i.e. a "disk" irregular. Its core seems to have suffered dramatically from a semi-recent close encounter with M81, being in a heavy starburst and displaying conspicuous dark lanes. This turbulent explosive gas flow is also a strong source of radio noise, discovered by Henbury Brown in 1953.

As a member of the M81 group, M82 is 12 million light years distant.

Source and more: SEDS


February 9, 2008 21:47 - 22:34 UT.
Imaging: William Optics Zenithstar 80 ED II APO F/6.8 [focal length 545 mm], ATK16IC camera, Astronomik LRGB filters.
Exposures: L 10x180s [1x1]; RGB 5x30 [2x2]; all unguided.

February 6, 2008 22:31 - 23:09 UT.
In order to get M81 and M82 both in the FOV of my setup I rotated the camera 90 degrees; during the processing I rotated back, so North is up in this image.
Imaging: William Optics Zenithstar 80 ED II APO with Meade 3.3 Focal Reducer at f/3 [focal length 240 mm], ATK16IC camera, Astronomik LRGB filters.
Exposures: L 14x120s [1x1]; RGB 5x30s [2x2], unguided.

April 4, 2006 20:56 - 21:39 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 colour camera, Baader Infra Red Blocking Filter.
36 autoguided exposures of 50 seconds.


April 2, 2006 19:51 - 20:05 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.
35 autoguided exposures of 20 seconds.