Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Hourglass nebula  ·  IC 1274  ·  IC 1275  ·  IC 4684  ·  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 4Sgr  ·  The star 7Sgr  ·  The star 9Sgr  ·  Trifid nebula

Image of the day 06/11/2016

Getting plate-solving status, please wait...
    Sunflowers - M8,M20 & NGC 6334 in Narrowband, 



    
        

            Andy 01
    Sunflowers - M8,M20 & NGC 6334 in Narrowband
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    Sunflowers - M8,M20 & NGC 6334 in Narrowband

    Technical card

    Imaging telescopes or lenses: StellarVue SV70T

    Imaging cameras: QSI 683WSG-8 OAG QSI 683

    Mounts: Skywatcher NEQ6

    Guiding cameras: Starlight Xpress Lodestar Off Axis Guider

    Software: StarTools 1.3.5RC Startools 1.3.5  ·  Nebulosity 3.2

    Filters: astrodon 5nm NB filters NarrowBand Filters

    Accessory: Kendrick Standard Dual Channel Controller


    Dates:June 3, 2016

    Frames: 60x1200" (20h)

    Integration: 20h

    Avg. Moon age: 27.67 days

    Avg. Moon phase: 3.87%


    Basic astrometry details

    Astrometry.net job: 1109244

    RA center: 18h05m10s.8

    DEC center: -23°4724

    Pixel scale: 3.280 arcsec/pixel

    Orientation: -41.765 degrees

    Field radius: 1.779 degrees


    Resolution: 620x826

    Locations: Burwood, Melbourne, Victoria, Australia

    Description

    Inspired by Van Gogh's famous still life painting - "Sunflowers" and an APOD from 2007 here we have the Sagittarius triplet in glorious narrowband, taken from my light polluted suburban backyard in Melbourne, Australia.

    Approximately 20 hrs exposure in all in 20min subs. 7 Hrs Ha, & 8 hrs S2 and 5 hrs O3 (All 5nm Astrodon filters) with RGB stars, 15 x 1min R,G&B.

    Very tricky to process with the brightness range being extreme over these three objects. The M8 core and M20 are insanely bright, and NGC 6334 is very dim. Also the surrounding area is rich in Ha and S2 so they needed to be toned down to emphasise the "flower vase" structure. I wanted to "respect the light" but I had to compensate by dimming down certain areas for an overall pleasing aesthetic effect.

    Havn't seen too many Sagittarius triplets with this NB treatment and composition, so I hope you like it and thanks for looking!

    UPDATE: Image chosen as NASA APOD June 24th, 2016

    Comments

    Revisions

      Sunflowers - M8,M20 & NGC 6334 in Narrowband, 



    
        

            Andy 01
      Original
    • Final
      Sunflowers - M8,M20 & NGC 6334 in Narrowband, 



    
        

            Andy 01
      B

    B

    Description: Core detail sharpened - minor colour mapping revisions

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    Sunflowers - M8,M20 & NGC 6334 in Narrowband, 



    
        

            Andy 01