M 109
About image
M 109 is a barred spiral galaxy in Ursa Major constellation: its estimated distance is 55 million light years and the real diameter is about 120000 light years.
Its spiral structure is quite regular and the arms can be followed through an entire revolution.
Several other remote galaxies are visible in the field: the brightest two ones (at bottom side of the image and on the upper right side) are companions.
The galaxy is located about 1° from the bright star Phekda - Gamma Ursae Majoris.
The light of this star is very invasive, even if it is out of the field: some faint light stripes are visible in the upper side of the image, but are not so "disturbing".
Technical data R 24x300" bin3 -15C all gain 100
Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details L 63x300" bin3 -15C
G 24x300" bin3 -15C
B 24x300" bin3 -15C
Total integration 11h15'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L 21.00
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 29/30/31 December 2024
© Roberto Marinoni 2019 - All rights reserved