- The Trifid Nebula
Nebula in Sagittarius
Instrument: 12.5" f/5 Home made Newtonian
Platform: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Cooling
Guider: SBIG ST4
Exposure: B+L(RGB) = 20:60:20:20:20 (RGB Binned 2x2)
RGB Combine Ratio: 1: 1.05: 1.11
Filters: AstroDon RGB Tricolor
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing FWHM = 5.5 arcsec (Maxim DL - 10min subframe), Transparency 7/10
Outside Temperature: 55 F
CCD Temperature: -20 C
Processing Tools: Maxim DL, Photoshop, PixInsight
HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS
GLOBULARS OPEN CLUST PLANETARIES LINKS
are few objects in the sky that show a combination of both emission
and reflection nebulosities so clearly as the Trifid. At first
glance, this image looks very blue. That is because nearly the
entire field of view is filled with dim reflection nebulosity.
Only in the upper left corner, and within the dust lanes in the
emission portion do you see the actual neutral tinted sky. The
dark lanes cutting through the nebulosity is in front of the
nebula blocking the light beyond. Much of it is brownish or yellow
tinted, caused by the spectral absorption of dust of blue wavelengths.
The upper red
nebulosity is M20 with the internal dark lanes are Barnard 85.
The blue part of the nebulosity is also M20, but separately is
LBN27. The field here spans half a degree wide, and easily contains
the brightest portions, however the blue part spills out into
the surrounding fields.