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Contains:  NGC 891
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Edge-on spiral galaxy C23/NGC891 (m), 





    
        

            Ram Samudrala
Edge-on spiral galaxy C23/NGC891 (m)

Technical card

Resolution: 2656x2322

Dates:Oct. 1, 2017

Frames:
30x120" (gain: 350.00) -20C bin 1x1
24x300" (gain: 350.00) -20C bin 1x1

Integration: 3.0 hours

Darks: ~10

Avg. Moon age: 10.46 days

Avg. Moon phase: 80.45%

Bortle Dark-Sky Scale: 3.00

Temperature: 10.00

Astrometry.net job: 1799978

RA center: 35.635 degrees

DEC center: 42.345 degrees

Pixel scale: 0.359 arcsec/pixel

Orientation: 112.275 degrees

Field radius: 0.176 degrees

Locations: Ram Samudrala, Youngstown, NY, United States

Data source: Backyard

Description

This edge-on spiral galaxy with an apparent magnitude of 10.8 is thought to resemble our own Milky Way (if we look at it edge-on). The image is compromised in a couple of respects: The artifact on the right is due to a reflection caused by the flat field lens on back of the EdgeHD. I was being lazy and didn't have the right distance between that lens and the camera's sensor (146 mm) and I just inserted a 1.25" t-threaded nosepiece into the 1.25" diagonal adapter since I didn't want to screw/unscrew my camera. The reflection is barely perceptible when the data was being collected and only showed up when I stretched the image. Also, not having a microfocusser made it hard to achieve precise focus. Nonetheless, I think it turned out okay with some detail in the dust lanes.

Comments

Author

ramdom
Ram Samudrala
License: Attribution Creative Commons
2621
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Revisions

  • Edge-on spiral galaxy C23/NGC891 (m), 





    
        

            Ram Samudrala
    Original
  • Edge-on spiral galaxy C23/NGC891 (m), 





    
        

            Ram Samudrala
    B
  • Edge-on spiral galaxy C23/NGC891 (m), 





    
        

            Ram Samudrala
    C
  • Final
    Edge-on spiral galaxy C23/NGC891 (m), 





    
        

            Ram Samudrala
    D

B

This is a cropped version of the first image focussing only on the galaxy.

C

This is an image focussed on the central band rather than the overall shape of the galaxy.

D

This is a cropped version of (C), focussing on the central band with the filaments clearly visible.

Sky plot

Sky plot

Histogram

Edge-on spiral galaxy C23/NGC891 (m), 





    
        

            Ram Samudrala