The Box, galaxy group Hickson 61 (HCG 61)

Posted: 16 Sep, 2020

Objects: Less More

Technical Info

Telescope or Lens: 8" Celestron Schmidt-Cassegrain CPC800 GPS (XLT)

Camera: Starlight Xpress Trius SX694

Mount: equatorial wedge

Guide Scope: Baader 61x250mm

Guide Camera: ASI120MM

Software: MaxIm DL6, PHD2, PixInsight, StarTools, Photoshop CC, Zoner photo studio 14

Accessories: reducer Starizona 0.75x, filters Astrodon LRGB E-series gen.2

Exposure:

72 x 300" ISO/Gain: 0 - Astrodon L

12 x 600" ISO/Gain: 0 - Astrodon R

12 x 600" ISO/Gain: 0 - Astrodon G

12 x 600" ISO/Gain: 0 - Astrodon B

Yellow zoneLight Pollution:

Chervonograd, Ukraine

16.09.2020

THE BOX, GALAXY GROUP HICKSON 61 (HCG 61)

Telescope or Lens: 8" Celestron Schmidt-Cassegrain  CPC800 GPS (XLT)
Camera: Starlight Xpress Trius SX694
Mount: equatorial wedge
Guide Scope: Baader 61x250mm
Guide Camera: ASI120MM
Software: MaxIm DL6, PHD2, PixInsight, StarTools, Photoshop CC, Zoner photo studio 14
Accessories: reducer Starizona 0.75x, filters Astrodon LRGB E-series gen.2

Chervonograd, Ukraine
Light Pollution: Yellow zone

Exposure:
72 x 300" ISO/Gain: 0 - Astrodon L
12 x 600" ISO/Gain: 0 - Astrodon R
12 x 600" ISO/Gain: 0 - Astrodon G
12 x 600" ISO/Gain: 0 - Astrodon B

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.

Viewer link: https://deepskyhosting.com/CS7XKzo
Author: Boris_US5WU

12 h 0 m

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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.

Resolution: 2111x1709 px

Scale: 2749 KB

Boris_US5WU

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Comments

Богдан

Классно. Сильно кропаете поле с корректором? Интересно, на сколько правит поле по краям. Себе хотел прикупить вместо Мидовского. Но у старизоны пока только предзаказ висит на 0,63

18 Sep, 2020 Reply

Boris_US5WU Replied to Богдан

Спасибо Богдан! У меня диагональ сенсора всего 15мм, поэтому редуктор 0,75х правит это поле отлично, причём ошибка выставления бэкфокуса может доходить до 3мм без деградации углов кадра. В этом снимке почти полный кадр (обрезаны артефакты сложения) и сделан ресайз около 85% от оригинала. Помню, снимал на Canon 1100D, поле было тоже ровное с круглыми звёздами в углах.

18 Sep, 2020 Reply

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