The Box, galaxy group Hickson 61 (HCG 61)
Photo description / processing
The Box, galaxy group Hickson 61 (HCG 61) in the constellation Coma Berenices.
The bluish spiral at the top is NGC 4173 and the edge-on galaxy next to it is NGC 4175. The smallest galaxy, at the bottom, is NGC 4174 and the last one (an elliptical) is NGC 4169. The bluish NGC 4173 is only about 50 million light years distant while the other three are at a distance of about 180 million light years, indicating that NGC 4169, 4174, and 4175 are likely to be physically related while NGC 4173 is definitely a foreground object.
This image taken in May, June 2019.
L-channel - 72 x 300 sec. bin 1x1;
R-channel - 12 x 600 sec. bin 1x1;
G-channel - 12 x 600 sec. bin 1x1;
B-channel - 12 x 600 sec. bin 1x1.
Total integration time - 12:00 hours.
Technical information
- Telescope/Lens
- Celestron CPC 800 GPS XLT
- Camera
- Starlight Xpress Trius SX-694
- Mount
- Equatorial Wedge
- Guide Scope
- Baader Guide Scope 61/250
- Guide Camera
- ZWO ASI120MM
- Accessories
- Starizona 0.75x Reducer, Astrodon LRGB E-Series Gen. 2 Filter Set
- Software
- MaxIm DL, PHD2, Pixinsight, StarTools, Adobe Photoshop, Zoner Photo Studio 14
- Location
- Chervonograd, Ukraine
Light pollution
Yellow, Bortle 5 zone
- Date taken
Exposure
- 72 × 300″ · ISO/Gain: 0 · Astrodon L ·
- 12 × 600″ · ISO/Gain: 0 · Astrodon R ·
- 12 × 600″ · ISO/Gain: 0 · Astrodon G ·
- 12 × 600″ · ISO/Gain: 0 · Astrodon B ·
Total exposure: 12 h 0 m
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