IC 1274, IC 1275, IC 4685, NGC 6559, Barnard 91, Barnard 303 in Sagittarius

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  12" ASA: LRGB 12" ASA: LRGB annotated 12" ASA: LRGB - 100% crop    
  Size: 2000 px   Size: 2000 px    
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© Velimir Popov & Emil Ivanov 2013

This image contains several objects catalogued in the NGC and IC catalogues. IC 1274 is the bright, circular nebula at the top center of the image. Just below is the fainter circular nebula IC 1275. Between the two is situated a wide dark nebula Barnard 91. At the bottom centre is a bright filament known as NGC 6559. The thin dark lane to its upper right is Barnard 303. The nebulosity around Barnard 303 is IC 4685. Finally, just above center along the left margin of the image is a portion of open cluster NGC 6546. This complex in Sagittarius lies about slightly more than one degree of its much more famous neighbor, the Lagoon Nebula. In fact, some studies show that it is physically related to M8.

Object details

Right Ascension 18:09:50 (h:m:s)
Declination -23:38:54 (deg:m:s)
Distance ~ 5.0 (кly)
Apparent Dimension 5 x 6 (arc min)

Image details


Center of field RA 18:09:40 (h:m:s)
Center of field DE -23:50:46 (deg:m:s)
Size 57.2 x 42.9 (arcmin)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is 177 degrees E of N
Charts and image details obtained from Astrometry.net
Optic(s): ASA 12" f 3,6 Astrograph (ASA)
Mount: ASA DDM85
Camera: FLI MicroLine 8300 CCD camera
Filters: Red, Green, Blue, Astrodon
Dates/Times: 13 May 2013
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details: L:6x10min,R:4x10min, G:4x10min, B:4x10min,, Bin 1
  Total Exposure Time - 180 min
More details: Dark and flat frames reduction,
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013. All Rights Reserved
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