Trifid Nebula - M20

Imaging telescope or lens:GSO 8" f/5 Newton

Imaging camera:ZWO ASI 183 MM PRO

Mount:SkyWatcher NEQ6 Pro Goto

Guiding telescope or lens:GSO 8" f/5 Newton

Guiding camera:Astrolumina Alccd5L-IIc

Focal reducer:Pal Gyulai GPU Aplanatic Koma Korrector 4-element

Software:DeepSky Stacker Deep Sky Stacker 3.3.4, Main Sequence Software Seqence Generator Pro, FitsWork 4, Adobe PhotoShop CS5, PHD2 Guiding

Filters:Baader B 1.25'' CCD Filter, Baader G 1.25'' CCD Filter, Baader R 1.25'' CCD Filter, Baader L 1.25'' Filter

Accessory:TSOptics TS Off Axis Guider - 9mm

Dates:June 28, 2019, June 29, 2019

Frames:

Baader B 1.25'' CCD Filter: 10x240" (gain: 53.00) -20C bin 1x1

Baader G 1.25'' CCD Filter: 10x240" (gain: 53.00) -20C bin 1x1

Baader L 1.25'' Filter: 28x240" (gain: 53.00) -20C bin 1x1

Baader R 1.25'' CCD Filter: 10x240" (gain: 53.00) -20C bin 1x1

Integration: 3.9 hours

Darks: ~37

Flats: ~27

Bias: ~100

Avg. Moon age: 25.53 days

Avg. Moon phase: 17.26%

RA center: 270.621 degrees

DEC center: -22.991 degrees

Pixel scale: 0.495 arcsec/pixel

Orientation: 268.550 degrees

Field radius: 0.436 degrees

Locations: Linden, Linden, Bayern, Germany

Data source: Traveller

 

Object description (wikipedia.org):

 

The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region located in Sagittarius. It was discovered by Charles Messier on June 5, 1764. Its name means 'divided into three lobes'. The object is an unusual combination of an open cluster of stars; an emission nebula (the lower, red portion), a reflection nebula (the upper, blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance; these are also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.

 

The Trifid Nebula is a star-forming region in the Scutum spiral arm of the Milky Way. The most massive star that has formed in this region is HD 164492A, an O7.5III star with a mass more than 20 times the mass of the Sun. This star is surrounded by a cluster of approximately 3100 young stars.

 

Done