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Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Barnard's Galaxy  ·  HD186317  ·  HD186499  ·  LBN 83  ·  NGC 6822
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Barnard Galaxy, Los_Calvos
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Barnard Galaxy

Getting plate-solving status, please wait...
Barnard Galaxy, Los_Calvos
Powered byPixInsight

Barnard Galaxy

Equipment

Imaging Telescopes Or Lenses
Planewave CDK12.5
Imaging Cameras
Moravian Instruments G4-16000 MK II
Mounts
Astro-Physics 1100GTO
Filters
Chroma Blue 50x50 mm · Chroma Green 50x50 mm · Chroma H-alpha 3nm Bandpass 50x50 mm · Chroma Lum 50x50 mm · Chroma OIII 3nm Bandpass 50x50 mm · Chroma Red 50x50 mm · Chroma SII 3nm Bandpass 50x50 mm
Accessories
Skymeca Skytrack 3.0
Software
Adobe Photoshop · Pleiades Astrophoto PixInsight
Guiding Cameras
Atik 414EX Mono

Acquisition details

Dates:
July 7, 2022 ·  July 8, 2022 ·  July 9, 2022 ·  July 10, 2022 ·  July 13, 2022
Frames:
Chroma Blue 50x50 mm: 29×300″(2h 25′) bin 1×1
Chroma Green 50x50 mm: 15×300″(1h 15′) bin 1×1
Chroma H-alpha 3nm Bandpass 50x50 mm: 18×1200″(6h) bin 1×1
Chroma Lum 50x50 mm: 157×300″(13h 5′) -20°C bin 1×1
Chroma OIII 3nm Bandpass 50x50 mm: 18×1200″(6h) bin 1×1
Chroma Red 50x50 mm: 14×300″(1h 10′) bin 1×1
Integration:
29h 55′
Darks:
55
Bias:
220
Avg. Moon age:
10.39 days
Avg. Moon phase:
75.85%
Bortle Dark-Sky Scale:
1.00

RA center: 19h44m59s.860

DEC center: -14°47′52″.74

Pixel scale: 0.732 arcsec/pixel

Orientation: 0.757 degrees

Field radius: 0.566 degrees

WCS transformation: thin plate spline

More info:Open 

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Resolution: 3920x3952

File size: 88.7 MB

Data source: Own remote observatory

Remote source: Observatorio El Sauce

Description

NGC 6822 Barnard GalaxyForming part of the Local Group, NGC 6822 is an irregular dwarf galaxy similar to the Small Magellanic Cloud (SMC). At a distance of  1.5 Million of light year, (m − M)0 = 23.45 ± 0.15 mag it is the closest “independent” galaxy of this type beyond the Magellanic Clouds. Its close proximity and apparent isolation have made NGC 6822 a popular candidate for studies of galactic evolution, without the strong gravitational influences of other systems.The morphology of the galaxy can be broadly divided into three structural components ; firstly, a central bar which contains much of the young stellar population is clearly visible at optical wavelengths and is orientated almost in a north-south direction. This bar is embedded in a large envelope of neutral hydrogen oriented in a roughly SE-NW direction. Although this kind of HI structure is not unique in the Local Group – IC 1613 and IC 10 have similar structures – NGC 6822 is unusual in that the HI envelope is so much more extended than the main optical component. A third, halo-like structure made up of old- and intermediate age stars has been detected in 2002 and is approximately  ~1 degree along the major axis. This elongated spheroidal structure is positioned orthogonally to and is dynamically decoupled from the HI envelope.Above the galaxy Hubble-V is an active star-forming region within galaxy NGC 6822. The cloud is about 200 light-years across and contains a dense knot of dozens of ultra-hot stars, each 100,000 times brighter than our Sun. In addition of the others HII regions in this field 18 NP and 9 HI regions have been located (see inverted image).

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Barnard Galaxy, Los_Calvos
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