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Contains:  NGC 4052, IC 2948, lambda Cen nebula, IC 2944, NGC 3766, IC 2872, IC 2714, NGC 3603, NGC 3576, The star θ1Cru, The star λCen
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Lambda Centauri Nebula and Surroundings, 





    
        

            Gabriel R. Santos...
Lambda Centauri Nebula and Surroundings

Lambda Centauri Nebula and Surroundings

Technical card

Resolution: 2400x1600

Dates:April 9, 2016

Frames: 20x120" ISO800

Integration: 0.7 hours

Darks: ~19

Bias: ~20

Avg. Moon age: 2.37 days

Avg. Moon phase: 6.23%

Temperature: 14.50

Astrometry.net job: 1365769

RA center: 173.472 degrees

DEC center: -63.144 degrees

Pixel scale: 9.868 arcsec/pixel

Orientation: 175.626 degrees

Field radius: 3.953 degrees

Locations: Sítio, Cristina, MG, Brazil

Description

This is a widefield of the region centered on Lambda Centauri, the brightest star in the center of the image. The most notable DSO in this image is the homonimous nebula, also known as the Running Chicken Nebula because of its apparent shape, or IC 2944. Bright nebulae abound in and around the southern constellation of Centaurus. Lambda Cen. is not far on the sky from the better known Eta Carinae Nebula. Embedded in the reddish glowing cloud of hydrogen gas, typical of emission nebulae, is an open cluster with the associated emission nebula. In the top right hand corner of the image, NGC 3581 in Carina, and below it a pronouced dark nebula is also visible. I couldn't find its catalogue name, if you know, please let me know in the comments. [Paragraph with sections adapted from Wikipedia and APOD]

This field is a real processing challenge: the very dense starfield not perfectly sampled by my too short 200mm lens challenge the compromise between star bloat, shape and making the nebulosity pop. Furthermore, my DSLR, being unmodified, captured a shy fraction of the redness of the Ha emitting nebula, and, therefore, doesn't show its full extent and difficult processing. All things told, although far from perfect, this is my rendition of the area from earlier 2016, comparable to my 1st attempt: http://astrob.in/184500/B/ Which do you prefer?

*Please check the full image 2400px - resized from original)*

Constructive criticism, comments and suggestions are more than welcome in the comments section. Thank's for taking your time to look at this image.

Taken from Rural Skies (Bortle 3-4; NELM ~6.2; SQM ~21.4*calculated), from Cristina, MG, Brazil (22ºS latitude).

Date and Time: April 9th, 2016, at 22h (UTC-3, start of capture)
Camera: Unmodded Canon T4i/650D, at ISO 800
Lens: Tamron 70-200mm f/2.8, at 200mm, operated at f/3.5
Mount: Sky-Watcher HEQ5, tracking, unguided
Exposure Detail: 20x120s (total 40min)

Comments

Author

grsotnas
Gabriel R. Santos...
License: None (All rights reserved)
2371
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Revisions

  • Lambda Centauri Nebula and Surroundings, 





    
        

            Gabriel R. Santos...
    Original
  • Lambda Centauri Nebula and Surroundings, 





    
        

            Gabriel R. Santos...
    B
  • Final
    Lambda Centauri Nebula and Surroundings, 





    
        

            Gabriel R. Santos...
    C

B

Improved color, a little bluer

C

Revision -B- with added saturation

Sky plot

Sky plot

Histogram

Lambda Centauri Nebula and Surroundings, 





    
        

            Gabriel R. Santos...