Deep Sky Object in Spring
M101 (Pinwheel Galaxy in Ursa Major)
|Date & Time: ||Jan 12 2013, from 27:32 to 28:32 JST(+0900)
|Mosaic of 2 flames of 4 shots composed with 8 min. exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Canon EOS 600D (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
M101 (NGC5457) is a vast galaxy with open spirals, equivalent size to about two-third of the Moon and about 22 million light years away.
Although seen face on, it's dim and it takes a large scope and a good sky to see this nebula at its best.
|M101 (NGC5457) / Galaxy, type SAB(rs)cd I|
|R.A.||14h 03m 12.7s (2000.0)|
|Dec.||+54° 21' 03" (2000.0)|
|Distance||22.5 million light yrs.|
|Group of Galaxies||M101 Group|
|Other IDs||UGC8981, MCG9-23-28, |
PGC50063, Arp 26
The galaxy is located 4 degrees east of zeta UMa (Mizar), the second star from the tip of the Big Dipper's handle,
and the usual method given to find M101 is to the hop of several stars with fifth or sixth magnitude from Mizar.
Wide-field image around M101 (60KB)
||From Mizar to M101
The star-hop route from Mizar to M101. You can find out M101 easily by tracing 81, 83, 84 and 86 UMa eastward.
(Taken with f=200mm telephoto lens)