Comet 21P / Giacobini-Zinner on 17.09.2018 near NGC 2174 (Monkey Head Nebula)

  Size: 1800 px      
© Velimir Popov & Emil Ivanov 2018

21P/Giacobini–Zinner is a periodic comet, which was discovered by Michel Giacobini on December 20, 1900. It was recovered two passages later by Ernst Zinner on October 23, 1913. During its apparitions, Giacobini–Zinner reaches about the 8th magnitude, but in 1946 it underwent a series of outbursts that made it as bright as 5th magnitude. It is the parent body of the Draconids meteor shower (also known as Giacobinids).The comet nucleus is estimated to be 2.0 kilometers in diameter. This image shows the comet on September 17th 2018 at 00:30 UT, near NGC 2174(Monkey Head Nebula)

Image details:


Center of field RA 06:11:49 (h:m:s)
Center of field DE +20:59:16 (deg:m:s)
Size 1.94 x 1.29 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 247 degrees E of N
Charts and image details obtained from
Optic(s): ASA 12" Astrograph @ f/3.6 (Newton)
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters
Dates/Times: 17. Sep. 2018 00:20 UT
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L:1x3min., R:1x3 min, G:1x3 min, B:1x3 min, Bin 2, Total Exposure Time - 12 min.
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013 - 2018. All Rights Reserved
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