Comet C/2022 E3 (ZTF) and open cluster NGC 1647 on 13.02.2023

  Size: 1800 px      
© Velimir Popov & Emil Ivanov 2023
C/2022 E3 (ZTF) is a long-period comet from the Oort cloud that was discovered by the Zwicky Transient Facility (ZTF) on 2 March 2022. The comet has a bright green glow around its nucleus, due to the effect of sunlight on diatomic carbon and cyanogen. The comet nucleus was estimated to be about a kilometer in size, rotating every 8.7 hours. Its tails of dust and gas extended for millions of kilometers and, during January 2023, a third anti-tail was visible. The comet reached its perihelion on 12 January 2023, at a distance of 1.11 AU (166 million km; 103 million mi), and the closest approach to Earth was on 1 February 2023, at a distance of 0.28 AU (42 million km). The comet reached magnitude 5 and was visible with the naked eye under moonless dark skies. This image shows the comet on the night of February 13th using the new TS-Optics Ritchey-Chretien RC16 Pro, D = 406 mm (16”), f/8. The comet is visibly near to the open cluster NGC 1647.

Image details:


Center of field RA 04:44:42 (h:m:s)
Center of field DE +19:11:06 (deg:m:s)
Size 46.8 x 46.5 (arcmin)
Pixel scale: 1.56 (arcsec/pixel)
Orientation: Up is 359.6 degrees E of N
Charts and image details obtained from
Optic(s): TS-Optics Ritchey-Chretien RC16 Pro, D = 406 mm (16”), f/8
Mount: ASA - DDM85 Premium
Camera: MORAVIAN C4-16000 cooled scientific CMOS
Filters:  B, V, R, (Bessel) filters
Dates/Times: 13. feb. 2023
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: R:5x1 min, V::5x1 min, B:5x1 min, Bin 1, Total Exposure Time - 15 min.
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013 - 2023. All Rights Reserved
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