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Hemisphere:  Northern  ·  Contains:  NGC 7317, NGC 7318, NGC 7319, NGC 7320, NGC 7331, NGC 7335, NGC 7337, NGC7317, NGC7318, NGC7319, NGC7320, NGC7331, NGC7333, NGC7335, NGC7336, NGC7337, NGC7338, NGC7340, Stephan's Quintet
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Deer Lick Group & Stephan's Quintet, 


            Kurt Zeppetello
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Deer Lick Group & Stephan's Quintet

Imaging telescopes or lenses: Astro-Tech AT115EDT f/7

Imaging cameras: ZWO ASI 1600MM-Cool

Mounts: Orion Sirius EQ-G (HEQ5)

Guiding telescopes or lenses: Agena 50mm Guide Scope with Helical Focuser

Guiding cameras: QHY-5-L-II-M Planatary & Autoguider

Focal reducers: Astro-Tech 0.8x reducer/field flattener

Software: Adobe photoshop  ·  Pleiades Astrophoto PixInsight  ·  AstroPhotography Tools APT capture software  ·  Astronomy Tools - PS  ·  PHD Guiding

Filters: ZWO B 1.25" optimized for ASI1600  ·  ZWO G 1.25" optimized for ASI1600  ·  ZWO R 1.25" optimized for ASI1600  ·  ZWO L 1.25" optimized for ASI1600

Accessory: ZWO EAF Electronic Focuser  ·  ZWO 8x 1.25" Filter Wheel (EFW)

Dates:Oct. 23, 2019Oct. 24, 2019

ZWO B 1.25" optimized for ASI1600: 59x12" (gain: 139.00) -10C bin 1x1
ZWO G 1.25" optimized for ASI1600: 41x90" (gain: 139.00) -10C bin 1x1
ZWO L 1.25" optimized for ASI1600: 99x90" (gain: 139.00) -10C bin 1x1
ZWO R 1.25" optimized for ASI1600: 59x90" (gain: 139.00) -10C bin 1x1

Integration: 5.2 hours

Darks: ~12

Flats: ~15

Bias: ~20

Avg. Moon age: 24.82 days

Avg. Moon phase: 23.28%

Bortle Dark-Sky Scale: 5.00

Temperature: 13.00 job: 3029194

RA center: 22h 36' 32"

DEC center: +34° 13' 1"

Pixel scale: 1.205 arcsec/pixel

Orientation: -89.376 degrees

Field radius: 0.579 degrees

Resolution: 2698x2159

Locations: Happy Frog Observatory, Monroe, Connecticut, United States

Data source: Backyard


The Deer Lick group, located on the lower left, consists of the large dusty spiral galaxy NGC 7331 approximately 40 million light-years away. It is thought to to be a twin of our own Milky Way galaxy. Also, the central bulge rotates in the opposite direction of the spiral arms. Several other smaller galaxies, just below the NGC 7331, are about ten times farther. Gary Imm describes the strange name coming from an amateur astronomer observing at the Deer Lick Gap in North Carolina.

Stephan's Quintet, located on the upper right, consists of four gravitationally interacting galaxies about 200 million light-years away. The fifth galaxy, NGC 7320, is only 40 million light years away, thus is not interacting with the other four galaxies. It is pretty easy to identify as it is blue and is only one not to be distorted.

I was hoping to get more detail, what a surprise - who isn't, but was happy with what I obtained. I had guiding issues on the first night of imaging when I got the Luminosity and Red and the exposures it looked fine but when imaged the Green and Blue on second night, it was apparent that the first night was not as good. It looked clear out side and it seemed focused but there may have been some mist. Processing went smooth and it was fun to work on galaxies again. These galaxies are relatively small so I cropped them quite a bit, a larger scope would be preferable for these objects.



Kurt Zeppetello
License: None (All rights reserved)

Sky plot

Sky plot


Deer Lick Group & Stephan's Quintet, 


            Kurt Zeppetello