Nebulas
IC 410
A faint, dusty rose of the northern sky, emission nebula IC 410 lies about 12,000 light-years away in the constellation Auriga. The cloud of glowing hydrogen gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893. Formed in the interstellar cloud a mere 4 million years ago, bright cluster stars are seen just below the prominent dark dust cloud near picture center. Notable near the 3 o'clock position in this wide, detailed view are two relatively dense streamers of material trailing away from the nebula's central regions. Potentially sites of ongoing star formation, these cosmic tadpole shapes are about 10 light-years long.
L = 17 * 900 sec. bin1, R = 14 * 1000 sec. bin2, G = 14 * 1100 sec. bin2, B = 14 * 1200 sec. bin2, Ha = 12 * 1800 sec. bin1, OIII = 14 * 1800 sec. bin1
Total 30 hours.
Pixinsight 1.8 and Photoshop.
NGC 6543
The Cat's Eye Nebula or NGC 6543, is a relatively bright planetary nebula in the northern constellation of Draco, discovered by William Herschel on February 15, 1786. It was the first planetary nebula whose spectrum was investigated by the English amateur astronomer William Huggins, demonstrating that planetary nebulae were gaseous and not stellar in nature.
NGC 6543 is a high northern declination deep-sky object. It has the combined magnitude of 8.1, with high surface brightness. Its small bright inner nebula subtends an average of 16.1 arcsec, with the outer prominent condensations about 25 arcsec. Deep images reveal an extended halo about 300 arcsec or 5 arcmin across, that was once ejected by the central progenitor star during its red giant phase.
L = 20 * 1800 sec. bin1, RGB = 12 * 900 sec. bin2, Ha = 13 * 1800 sec. bin1, OIII = 12 * 1800 sec. bin1
Total - 31.5 hours.
Pixinsight 1.8, Photoshop.
july-august 2018, march-april 2019
NGC 7129
NGC 7129 is a reflection nebula located 3,300 light years away in the constellation Cepheus. A young open cluster is responsible for illuminating the surrounding nebula. A recent survey indicates the cluster contains more than 130 stars less than 1 million years old.
L = 21 * 1800 sec. bin1, Ha = 15 * 1800 sec. bin1, R = 14 * 1000 sec. bin2, G = 14 * 1150 sec. bin2, B = 14 * 1300 sec. bin2.
Total - 30.8 hours.
Processing - Pixinsight 1.8 and Photoshop.
SH 2-136
The Ghost Nebula (designated Sh2-136 and VdB 141) is a reflection nebula located in the constellation Cepheus. Looking at the adjacent image, the nebula's name is easily understood. The Ghost nebula is referred to as a globule (cataloged CB230) and over 2 light-years across. There are several stars embedded, whose emissions make the nebula shine in brownish color.
L = 17 * 1800 sec. bin1, RGB = 10 * 1000, 1150, 1300 sec. bin2, in each channel.
Total exposition - 18.1 hours.
Pixinsight 1.8, Photoshop.
