Hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  NGC 891
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NGC 891 - a new year, a new start?, 



    
        

            Tom Gray
NGC 891 - a new year, a new start?
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NGC 891 - a new year, a new start?

Getting plate-solving status, please wait...
NGC 891 - a new year, a new start?, 



    
        

            Tom Gray
NGC 891 - a new year, a new start?
Powered byPixInsight

NGC 891 - a new year, a new start?

Technical card

Imaging telescopes or lenses: Meade 2080 SCT 8" LX5

Imaging cameras: Meade DSI 3 Pro

Mounts: Meade Fork mount w/wedge Meade

Guiding telescopes or lenses: Meade 8x50mm Finder/Guider

Guiding cameras: Orion Starshoot autoguider

Software: SiliconFields / Ivo Jager StarTools v1.6  ·  Stark Labs Nebulosity v3  ·  PHD2 Guiding V 2.6  ·  Penumbra (George Morimosato) v0.6  ·  Meade Envisage V4.05

Filters: Meade RGB-IR Cut 1.25"

Accessory: Homemade ST4 autoguider


Dates:Jan. 5, 2021

Frames: 33x120" (1h 6')

Integration: 1h 6'

Avg. Moon age: 21.18 days

Avg. Moon phase: 60.21%


Basic astrometry details

Astrometry.net job: 4133925

RA center: 2h 22' 28"

DEC center: +42° 20' 38"

Pixel scale: 0.694 arcsec/pixel

Orientation: 63.657 degrees

Field radius: 0.163 degrees


Resolution: 1358x1010

Locations: Home 'observatory' (Bortle 5), Derbyshire, United Kingdom

Data source: Backyard

Description

I imaged this galaxy last September at f3.3 in my 8" SCT, but was disappointed with the scale and amount of noise. This image is taken at f10, and starts to show some detail in the dust lane that bisects the core of this edge on galaxy, which lies about 28m LY away, and spans 100,000 LY.

I captured just over two hours data (120s subs) but ended up throwing half of this away, due to tracking and other problems. On a mediocre night, swathes of cloud interfered with my guiding and capture, and I was lucky to get much data at all.

Frames were captured in Envisage with automatic dark subtraction, pre-processed in Nebulosity using a master flat, before aligning and stacking in Penumbra. The resulting data were then processed in Startools v1.6 using a standard workflow, followed by gentle lightening to brighten the image for publication.

It is still a bit noisy, and could be sharper, but given the conditions, I'm just pleased to have got started in 2021.

Comments

Revisions

  • NGC 891 - a new year, a new start?, 



    
        

            Tom Gray
    Original
  • Final
    NGC 891 - a new year, a new start?, 



    
        

            Tom Gray
    B

B

Description: This version was processed in Startools v1.7, and as well as a standard workflow, I have isolated the galaxy, using the 'super structure' module and applied some dimming to the stars. Perhaps not quite as much detail in the dust lane, but it certainly makes it stand out more.

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC 891 - a new year, a new start?, 



    
        

            Tom Gray