M33, The Triangulum Galaxy is quite small compared to its big apparent neighbor M31.

M33 is located in the constellation Triangulum, and at 3 million light years it is the most distant object which can be seen without any optical aids (from a very dark location).
The Triangulum Galaxy is the 3rd largest member of the Local Group of galaxies.
This group includes our own Milky Way Galaxy, M31 (Andromeda Galaxy) and approximately 30 other smaller galaxies.

Other versions

Previous/older images:

Sep 15, 2007 – Canon 350D (8″ GSO f4 Newt. 1h09m)

Image data

Object info
Name M33 – The Triangulum Galaxy
Type Spiral galaxy
Constellation Triangulum
Right ascension 01h 33m 50s
Declination +30° 39′ 37″
Distance 3 Mly
Other designations NGC598, PGC005818
Image info
Image date Oct. 14, 2009
Light frames 31x 6 min. @ ISO800 – IDAS LPS-P2
Total integration 3h 06m
Dark frames 20x
Flat frames 20x
Bias frames 30x
Software used DSLRFocus, Pixinsight LE, ImagesPlus, Photoshop CS2
Processing DSLRFocus was used to focus the scope and create the imaging series.
ImagesPlus 2.8 was used to calibrate the light frames with dark frames and flat frames.
Photoshop CS2 was used for post-processing, levels and curves adjustments.
Pixinsight LE (DBE) was used to get rid off the light pollution gradients.
Equipment info
Telescope TMB/LOMO 80/480
Corrector Televue 2″ TRF 2008 flattener/reducer (FL: 384mm f/4.8)
Mount Losmandy G-11
Camera Canon 350D
Guide camera Atik 1HS Mono
Guide scope Vixen VMC110L
Autoguide software Guidemaster
Filters 2″ Baader UHC-S
Location Landgraaf, The Netherlands
Image comments