The Eagle Nebula (M16)

Posted by Wellerson Lopes
on Wednesday, August 22, 2018

Better resolution: https://www.flickr.com/photos/astrocamera/25674736617/in/photostream/lightbox/

Name: Eagle Nebula, NGC 6611, Messier 16
Type: Open cluster with nebulosity
Distance: near 7,000 light-years
Apparent magnitude: 6.4
Constellation: Serpens Cauda [1]

The Eagle Nebula Messier 16 (M16) is a conspicuous region of active star formation, situated in Serpens Cauda. The starforming nebula, a giant cloud of interstellar gas and dust, has already created a considerable cluster of young stars. The cluster is also referred to as NGC 6611, the nebula as IC 4703. The discoverer, Philippe Loys de Chéseaux, describes only the cluster when recording his 1745-1746 discovery. Charles Messier, on his independent rediscovery of June 3, 1764, mentions that these stars appeared "enmeshed in a faint glow", probably suggestions of the nebula.[1]

This stellar swarm is only about 5.5 million years old (according to the Sky Catalog 2000 and Götz) with star formation still active in the Eagle Nebula; this results in the presence of very hot young stars of spectral type O6. The cluster has a linear extension of about 15 light years. The nebula extends much farther out, to a diameter of over 30', corresponding to a linear size of about 70x55 light years. [1]

The highlights of this nebula don't stop here. We found in this nebula the famous "Pillars of Creation", structures similar to stalagmites situated in center of image. This region was target of Hubble Space Telescope in 1995 that made incredible images. The columns of pillars are composed of hidrogen and dust, that act like incubator of new stars. Inside of columns and surface of this structures, the astronomers found nodes, or globules, of dense gas, known as EGG (Evaporating Gaseous Globules). Various stars are being formed inside this globules.[2]

Sources:
[1] http://messier.seds.org/m/m016.html
[2] wikipedia

I registered this picture in two sessions: June, 24th 2017 in Munhoz - Minas Gerais - Brazil and other session at July, 27rd 2017 in rural zone of Campo Belo - Minas Gerais - Brazil.

Technical data:
Gain: 0, Offset: 10, camera's temperature: -15°C, 7h08m of exposition, darks, flats and bias applied.
The luminance channel was composed by H-Alpha narrowband and luminance extracted from RGB channel.
Filters
H-Alpha: 54 x 300s / Bin 1x1
R: 22 x 150s / Bin 2x2
G: 21 x 150s / Bin 2x2
B: 20 x 150s / Bin 2x2

Equipments:
- Equatorial Mount Orion Atlas EQ-G
- GSO Ritchey-Chretien Telescope 8" F8
- ZWO ASI1600MM Cooled
- Focal reducer Astro-Physics 67 CCDT
- Guided with ASI120MM ZWO using OAG
- ZWO EFWmini (5 x 1.25")
- Filter Optolong 1.25" H-Alpha 7nm
- Filter Optolong 1.25" R
- Filter Optolong 1.25" G
- Filter Optolong 1.25" B

Softwares
- Capture: APT - Astro Photography Tool 3.50
- Processing: PixInsight 1.8.5 and Adobe Photoshop CS5
- Guiding: PHD2
- Control: EQMOD and SkyTechX

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