Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Hourglass nebula  ·  IC 1274  ·  IC 1275  ·  IC 4685  ·  Lagoon nebula  ·  M 20  ·  M 21  ·  M 8  ·  NGC 6514  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6531  ·  NGC 6544  ·  NGC 6546  ·  NGC 6559  ·  The star 11Sgr  ·  The star 4Sgr  ·  The star 7Sgr  ·  The star 9Sgr  ·  Trifid nebula
M8 & M20 (from full frame to cropped), 



    
        

            Jan Curtis
M8 & M20 (from full frame to cropped)
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M8 & M20 (from full frame to cropped)

Technical card

Imaging telescopes or lenses: Nikon NIKKOR 180 F2,8 AIS ED

Imaging cameras: Nikon D7000 Nikkon 180mm f/2.8

Mounts: Astrotrac 320X-AG

Software: Photoshop CS 6 Adobe  ·  PIXINSIGHT PixInsinght 1.8 RC7


Dates:May 5, 2014

Frames: 87x60" (1h 27') ISO1000

Integration: 1h 27'

Avg. Moon age: 5.92 days

Avg. Moon phase: 34.72%

Bortle Dark-Sky Scale: 2.00

Temperature: 10.00


Basic astrometry details

Astrometry.net job: 443953

RA center: 18h 5' 17"

DEC center: -23° 46' 48"

Orientation: 162.010 degrees

Field radius: 2.051 degrees


Resolution: 620x620

Description

Skies darkened and cleared under mild temperatures after moon set.

The original image is raw unprocessed. Processed improvements will follow.

Post-process used PI and PS. Note contrast, color, noise reduction, star reduction, sharpness in final versions.

Comments

Revisions

  • M8 & M20 (from full frame to cropped), 



    
        

            Jan Curtis
    Original
  • M8 & M20 (from full frame to cropped), 



    
        

            Jan Curtis
    B
  • M8 & M20 (from full frame to cropped), 



    
        

            Jan Curtis
    C
  • Final
    M8 & M20 (from full frame to cropped), 



    
        

            Jan Curtis
    D

Sky plot

Sky plot

Histogram

M8 & M20 (from full frame to cropped), 



    
        

            Jan Curtis