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Contains:  IC 1275, NGC 6559, IC 1274, IC 4685, NGC 6544, NGC 6546, NGC 6530, M 21, NGC 6531, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, Trifid nebula, M 20, NGC 6514, The star 11Sgr, The star 9Sgr, The star 7Sgr, The star 4Sgr
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Saturn meets the Sagittarius triplet, 


            Roberto Colombari
Saturn meets the Sagittarius triplet

Saturn meets the Sagittarius triplet

Technical card

Resolution: 4490x4779 job: 2241962

RA center: 271.376 degrees

DEC center: -23.515 degrees

Pixel scale: 2.602 arcsec/pixel

Orientation: 7.373 degrees

Field radius: 2.369 degrees

Data source: Traveller


Saturn meets the Sagittarius triplet

I took advantage of a nice weather window yesterday night to gather new data for the M20 field that now, differently from 2 months ago (first session), has a very bright visitor in it.

Then I joined this field with the previous one over M8 and I reprocessed the entire mosaic.

Takahashi FS60c
Pegasus Astro SMFC
Feather touch FTF2015BCR-RP

55x150s gain 12 per each panel

Explanation: 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 large nebula bottom of center, and colorful M20 on top. The third, NGC 6559, is on the 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. This broad skyscape also includes one of Messier's open star clusters, M21, just above and right of the Trifid.

Source: APOD [reviewed]



Roberto Colombari
License: None (All rights reserved)

Sky plot

Sky plot


Saturn meets the Sagittarius triplet, 


            Roberto Colombari

In these public groups

Imagers of Italy