Hemisphere:  Southern  ·  Constellation: Sculptor (Scl)  ·  Contains:  NGC 55
Getting plate-solving status, please wait...
NGC55, 



    
        

            tommy_nawratil
Powered byPixInsight

NGC55

Getting plate-solving status, please wait...
NGC55, 



    
        

            tommy_nawratil
Powered byPixInsight

NGC55

Imaging Cameras
ZWO ASI1600MM-Cool
Filters
Astronomik LRGB 31mm
Accessories
Skywatcher/Lacerta GPU comacorrector
Software
Photoshop · Pleiades Astrophoto, S.L. Pix Insight · APT - Astro Photography Tool APT 3.13
Guiding Telescopes Or Lenses
Skywatcher 9x50 finder
Guiding Cameras
MGEN

Acquisition details

Dates:
Aug. 23, 2017
Frames:
82x180" (4h 6')
Integration:
4h 6'
Avg. Moon age:
1.83 days
Avg. Moon phase:
3.76%

RA center: 00h15m07s.677

DEC center: -39°1312.70

Pixel scale: 0.973 arcsec/pixel

Orientation: -175.365 degrees

Field radius: 0.459 degrees

More info:Open 

Resolution: 2715x2036

Locations: Hakos Guest Farm, 100km past Windhoek, Namibia

Data source: Backyard

Description

NGC55 is one of the great galaxies of the southern hemisphere, located in the constellation Sculptor next to the border to Phoenix. At a distance of 7 million lightyears, it is one of the nearest galaxies beyond the local group. Usually counted to belong to the Sculptor group of galaxies, it is the one next to us of these. At a dimension of 32x6 minutes of arc, classified as an SB spiral seen edge on, its a streak of the full size of the moon. Resolved are knots of blue giant stars and some of the big HII emission nebulas. There is no clear band of absorbing material as senn in other edge on spirals, but patches of dust. The brightness distribution is highly asymmetric, the weak bulge being totally off center. That could well be a sign of disturbance, as the other big spiral NGC300 is only about 1 milion lightyears away from it and there may be interaction going on.

Here presented is a crop serving as lead pic, a full field at100% resolution and an annotated version of the full field naming lots of background galaxies.

This picture was taken with a Boren-Simon carbon Newtonian at f/4 that unfortunately showed a lot of astigmatism. Together with its float glass primary that had the focus running with cooling temperatures, it led to distorted color frames in R and B channel, the distortion turning 90° in between. So the brighter stars got vividly colored red and blue "ears", which led me to call them the Clownstars. They are presented as a bonus, and how I did the retouche. Using borrowed equipment can certainly add an extra adventurous note to an astronomical expedition!

South is up!

Comments

Revisions

  • Final
    NGC55, 



    
        

            tommy_nawratil
    Original
    NGC55, 



    
        

            tommy_nawratil
    B
    NGC55, 



    
        

            tommy_nawratil
    C
    NGC55, 



    
        

            tommy_nawratil
    D

B

Description: full field

Uploaded: ...

C

Description: annotated version

Uploaded: ...

D

Description: the Clownstars

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC55, 



    
        

            tommy_nawratil