M100 - The Mirror Galaxy
Fri Jul 11 2025
I’ve tried to image this every year for the last 3-4 years and never succeeded until now! I almost ran out of time because this isn’t visible for very long each night this time of year so I was only able to get about 30 minutes of exposure time per night. I tried to use older data to have a long total integration time but had issues with my calibration files so I had to trash all of that and only use my most recent dataset but I’m happy to have finally produced an image of this that I’m happy with… until next year!
About this object
- Type
- Galaxy
- Constellation
- Coma Berenices (Berenice's Hair)
- Apparent magnitude
- 9.5
- Apparent size
- 6.1′ × 5.6′
- Catalogue designations
- M 100, NGC 4321
M 100 is a galaxy in the constellation Coma Berenices (Berenice's Hair). It shines at about magnitude 9.5 and spans roughly 6.1′ × 5.6′ on the sky.
Acquisition
- Antlia V-Pro Luminance 36 mm: 99 × 1m (1h 39m)
- Antlia V-Pro Red 36 mm: 105 × 1m (1h 45m)
- Antlia V-Pro Green 36 mm: 83 × 1m (1h 23m)
- Antlia V-Pro Blue 36 mm: 84 × 1m (1h 24m)
- Total integration: 6h 11m
Equipment
- Telescope / Lens: Celestron C8
- Camera: ZWO ASI2600MM Pro
- Mount: Celestron CGEM II
- Filters: Antlia V-Pro Blue 36 mm, Antlia V-Pro Green 36 mm, Antlia V-Pro Luminance 36 mm, Antlia V-Pro Red 36 mm
- Guiding scope: SVBony SV106 60mm Guide Scope
- Guiding camera: ZWO ASI174MM Mini
- Accessories: Celestron 0.63X SCT Reducer (94175), ZWO EFW 7 x 36mm
- Software: Pleiades Astrophoto PixInsight
Astrophotography by David Joyce, AstroDavido.