Astrophotography by Leonardo Orazi - Photo Gallery - Nebulae - Sagittarius Triplet - M8 / M20 / NGC6559
 Nebulae  Back to Photo Gallery - Nebulae
 Sagittarius Triplet - M8 / M20 / NGC6559 
Low Resolution            Mid Resolution            High Resolution            Full Resolution

About:
These three bright nebulae are often featured in telescopic tours of the constellation Sagittarius and the crowded starfields of the central Milky Way. In fact, 18th century cosmic tourist Charles Messier cataloged two of them; M8, the nebula on right bottom to the center , and colorful M20 above. The third, NGC 6559, is at left of M8, separated from the larger nebula by a dark dust lane. All three are stellar nurseries about five thousand light-years or so distant. The expansive M8, over a hundred light-years across, is also known as the Lagoon Nebula. M20's popular moniker is the Trifid. Glowing hydrogen gas creates the dominant red color of the emission nebulae, with contrasting blue hues, most striking in the Trifid, due to dust reflected starlight. [Text adapted from APOD]



Pubblications "Flickr" Explore - July 13, 2016
Optics: Takahashi FSQ-106EDXIII F/5 530mm. - APO Refractor
Mount: AP Mach1 GTO
Camera: Moravian G3-16200
Filters: Optolong LRGB 2"
Guiding Systems: SX Lodestar
Dates/Times: 01-02-03-05-06 July 2016
Location: Col Basset - Sestriere / Pragelato (Turin) - Italy
Exposure Details: L:R:G:B => 165:80:75:85 = > (33x5):(16x5):(15x5):(17x5) All Bin1 [num x minutes]
Cooling Details: -25 °C
Acquisition: Maxim DL/CCD, Voyager
Processing: CCDStack2+, PS CS5
Mean FWHM: 1.58 / 2.44
SQM-L: 21.58 / 20.99