M101
M101
The Pinwheel Galaxy, also known as Messier 101, M101, or NGC 5457, is a face-on spiral galaxy situated 21 million light-years (6.4 megaparsecs) from Earth in the constellation Ursa Major. Discovered by Pierre Méchain in 1781, it was subsequently confirmed by Charles Messier, who included it as one of the last entries in the Messier Catalogue.
Object: M101
Location: Portsmouth, UK
Mount: EQ Mode
Bortle Scale: 7
Total Session Time: 3 hours
Nights: 12th - 13th June 2024
Total Subs Used: 813 x 10 Subs
Seeing: Clear
Fits Stacked: Siril
Post-Processing Steps
1. GraXpert - Denoise v2.0
2. Siril - colour calibration, photometric colour calibration, removing green noise, colour calibration, GHST, histogram stretch, colour saturation.
M101
Object: M101
Location: Portsmouth, UK
Mount: EQ Mode
Bortle Scale: 7
Total Session Time: 4 hours
Nights: 8th June and 12th June 2024
Total Subs Used: 1224 x 10 Subs
Seeing: Clear
Fits Stacked: Siril
Post-Processing Steps
1. GraXpert - Denoise v2.0
2. Siril - colour calibration, photometric colour calibration, removing green noise, colour calibration, GHST, histogram stretch, colour saturation, Star Processing.
3. Astrosharp Below
M101 - Astrosharp
The Pinwheel Galaxy (left) was reprocessed with AstroSharp. Using Siril, we can identify many of M101's galactic neighbours which can be seen in the image below.
