Lagoon and Triffid Nebulae Widefield

Click image for 66% resolution version. Resolutions available: 1920x1460 (HD), 2556x1959 (66%), 3872x2968 (100%)

About this Image

Subject M8 Lagoon and M20 Triffid Nebulae region
Objects M8 Lagoon AKA NGC 6523, M20 Triffid AKA NGC 6514, NGC6559, SH2-34, SH2-28, SH2-22, NGC 6544, B31
Data SAO/NASA Astrophysics Data System (ADS) database entries: M8, M20
Description This is a widefield HaRGB image of M8/M20 region. The nebulae are embedded within a dark lane of the Milky Way which is itself flanked by the tumultuous golden star clouds of Sagittarius.

The Triffid nebula is located near the center of the image. Its upper blue reflection nebula is cased by light from a large bright star reflecting off dust in the area. The lower red portion is an emission nebula trisected by dark lanes which are the origin of the Triffid's naming.

The Lagoon nebula is situated in the mid lower left of the image. It is a large star forming emission nebula studded with newly born stars and dark bock globules that will eventually give birth to more stars.

The addition of Hydrogen Alpha (Ha) filter to the red channel helps improve the contrast of the major emission nebulae and makes the fainter SH2 emission nebulae structures visible.

Technical Details

Date 20110725-26
Location Gardnerville, Nevada, USA.
Optics Pentax 67 F/4 300mm EDIF
Filters Astrodon RGB and 6nm Ha narrowband, YR Cyclops filter wheel
Mount Takahashi EM20
Guiding SBIG ST402ME E-Finder
Camera FLI Microline 16803
Exposure Total exposure 3.6hrs - Ha 1hr, R 1hr, g 50m, B 45m
Processing Maxim/DL 5, CCDStack, Photoshop CS
Notes Slight tilt in optics - top left of image is a little soft

Equipment being setup in Bob and Kath's garden.

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