Hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  IC 2157  ·  M 35  ·  NGC 2158  ·  NGC 2168  ·  The star 5Gem
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M35 and NGC 2158, 



    
        

            rhedden
M35 and NGC 2158
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M35 and NGC 2158

Getting plate-solving status, please wait...
M35 and NGC 2158, 



    
        

            rhedden
M35 and NGC 2158
Powered byPixInsight

M35 and NGC 2158

Technical card

Mounts: Software Bisque Paramount MX

Guiding telescopes or lenses: Stellarvue SV F60M3

Focal reducers: Starizona APEX ED .65

Software: Topaz Labs Topaz DeNoise AI  ·  SiriL 0.99.6  ·  ImagesPlus 6.5 MLUnsold Digital Imaging  ·  GIMP  ·  Deep Sky Stacker  ·  Software Bisque The SkyX Professional  ·  Imagenomic LLC Noiseware

Accessory: orion starshoot autoguider


Dates:Feb. 6, 2021

Frames:
Astrodon 31mm LRGB E Series Gen 2 1.25": 56x120" (1h 52') -18C bin 1x1
Astrodon 31mm LRGB E Series Gen 2 1.25": 58x60" (58') -18C bin 1x1

Integration: 2h 50'

Avg. Moon age: 24.03 days

Avg. Moon phase: 30.55%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 4209105

RA center: 6h 8' 21"

DEC center: +24° 14' 16"

Pixel scale: 1.305 arcsec/pixel

Orientation: 16.113 degrees

Field radius: 1.158 degrees


Resolution: 4911x4081

Data source: Backyard

Description

M35 and NGC 2158 are two open clusters in the constellation Gemini. NGC 2158 is a very old cluster (est. 2 billion years) and many of its member stars appear ruddy orange, providing a nice contrast with the blue stars of the younger, closer cluster M35. Open clusters IC 2156 and IC 2157 also sneaked into the image on the right side.

This is an LRGB image comprised of 120 s RGB subs (22 Red, 14 Green, 20 Blue) and 58 luminance subs of 60 s. Seeing was poor, but it doesn't make much difference at 2.6" per pixel. The image has been cropped slightly.

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