Comet 45/P Honda - Mrkos - Pajdusakova on 18.12.2016

  Size: 1600 px      
© Velimir Popov & Emil Ivanov 2016

45P/Honda–Mrkos–Pajdušáková is a short-period comet discovered by Minoru Honda on December 3, 1948. The comet is named after Minoru Honda, Antonín Mrkos, and Ľudmila Pajdušáková. The comet has an elliptical orbit with a period of 5.25 years.The nucleus is estimated to be 0.5-1.6 kilometers in diameter. During the 2011 perihelion passage the comet was recovered on 5 June 2011 at apparent magnitude 21. The comet made a close approach of only 0.0600 AU (8,980,000 km) from the Earth on August 15, 2011. The comet will also pass close to Earth on February 11, 2017. This image was taken on the evening of December 18th in the very close time window between the twilight and the comet's hiding behind the nearby pine trees. Therefore only 5 two minite exposures could be done. Since these were made before the begin of the astronomical darkness, some gradient was present on the raw images, which made the processing a bit tricky. An image of the same comet during its previous perihelion passage can be seen here.

Image details:


Center of field RA 20:21:14 (h:m:s)
Center of field DE -22:02:20 (deg:m:s)
Size 64.7 x 44.4 (arcmin)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 104 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: 18. Dec. 2016
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L: 2x2, R:1x2 min, G:1x2 min, B:1x2 min, Bin 2, Total Exposure Time - 10 min.
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013 - 2016. All Rights Reserved
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