2010-04-17 , Luminance
|Optics:||Takahashi FSQ106ED f/5 (main)|
Scopos ED66 (guide)
Starlight SXV-M7 (guide)
|Exposure:||RGB = 120 minutes|
|Conditions:||about 4.5 – 5 mag (Bortle 6-7), hazy|
|Moon:||below horizon during imaging|
|Date:||17/18 April 2010|
|Remarks:||image processing assistance by Manfred Wasshuber|
M 101 object information
Dec: +54° 21′
Size: 29 x 27′
Distance: 23 million light years
Messier 101, the Pinwheel Galaxy is a large galaxy in Ursa major.
The galaxy was discoverd by French astronomer Pierre Méchain on March 27, 1781. Charles Messier verified the discovery and included the Pinwheel galaxy in his catalogue of Deep Sky objects.