By Patricio Leon | 2025-05-20
The Heron Galaxy
On 05/19/2025 11:00 pm by Steven Bellavia | Website | Smithfield, VA
The Heron Galaxy (NGC 5394 and NGC 5395) is a pair of interacting galaxies located 176 million light-years away in the constellation Canes Venatici.
I was inspired to capture this object by an image of it posted on Instagram and astrobin, by Tom Williams, using a 24-inch Dobsonian, with 18,000 x 1-second exposures. (His image is much better than mine).
Telescope: Apertura 6-inch f/12 Classic Cassegrain with Baader Alan-Gee reducer, which brings the scope to f/7.1, 1085mm focal length
Camera: ZWO ASI 294MM Pro, cooled to -10C
Mount: Sky-Watcher EQ6-R Pro using EQMOD software
Integration (Note: quantities are total captured, but not necessarily used in their entirety):
- Baader UV-IR cut, 192 x 30 seconds, Gain 121 BIN 2.
- Baader Red, 60 x 90 seconds, Gain 121 BIN 2
- Baader Green, 53 x 90 seconds, Gain 121 BIN 2
- Baader Blue, 70 x 90 seconds, Gain 121 BIN 2
- 25 Flat Frames, 25 Dark-Flat Frames and 30 Dark Frames for each set
To achieve the most detail, I created a super-Luminance frame from the best LRGB frames, based on FWHM and Eccentricity accept/reject criteria.
This resulted in 101 Luminance and 149 R-G-B, (250 frames of 375 captured , 4.6 hours out of 6.2 hours of data)
All of the RGB data was used for those channels, with no accept/reject criteria
processed in PixInsight, GIMP and Canon Digital Photo Professional