Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  B85  ·  M 20  ·  M20  ·  NGC 6514  ·  Sh2-30  ·  Trifid nebula
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Trifid Nebula, 


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Trifid Nebula

Getting plate-solving status, please wait...
Trifid Nebula, 


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Trifid Nebula

Imaging telescopes or lenses: Planewave CDK24

Imaging cameras: FLI Proline 16803

Mounts: Planewave L600

Guiding cameras: Starlight Xpress Ultrastar

Focal reducers: None

Software: Planewave PWI3  ·  Planewave PWI4  ·  PixInsight 1.8  ·  Sequence Generator Pro  ·  Photoshop CS3  ·  PHD Guiding 2  ·  Maxim DL6  ·  Neat Image V7

Filters: Astrodon 50mm B  ·  Astrodon 50mm R  ·  Astrodon 50mm L  ·  Astrodon 50 mm G

Accessory: FLI CFW-5-7  ·  Astrodon Monster MOAG  ·  Hedrick Focuser  ·  Planewave Delta-T  ·  Planewave EFA

Dates:Aug. 8, 2018

Astrodon 50 mm G: 15x120" (30') -20C bin 1x1
Astrodon 50mm B: 15x120" (30') -20C bin 1x1
Astrodon 50mm L: 30x120" (1h) -20C bin 1x1
Astrodon 50mm R: 14x120" (28') -20C bin 1x1

Integration: 2h 28'

Darks: ~20

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 26.15 days

Avg. Moon phase: 12.39%

Mean SQM: 21.60

Astrometry.net job: 2205529

RA center: 18h 2' 28"

DEC center: -22° 59' 19"

Pixel scale: 0.468 arcsec/pixel

Orientation: -179.222 degrees

Field radius: 0.366 degrees

Resolution: 3969x3993

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard


From August 5th through August 15th we were very fortunate to experience extremely steady, clear and dark skies in Julian, CA. This is the fourth of 6 objects I captured during this time.

"The Trifid Nebula is an H II region located in Sagittarius 5,000 ly from Earth. 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 upper, red portion), a reflection nebula (the lower, 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."


Sky plot

Sky plot


Trifid Nebula,