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| Image sequence stacked in median with background normalized. |
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| Image sequence stacked in median with background normalized. |
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| Animation of the image sequence, G channel. Registration on the comet. |
MPC observation computed with Astrometrica using NOMAD star catalog:
COD XXX
COM Long. 113 24 50.4 E, Lat. 23 12 47.5 N, Alt. 49m
OBS M.-T. Hui
MEA M.-T. Hui
TEL 0.08-m f/5.6 refractor + CCD
NET NOMAD
CK12X010 KC2014 01 22.87772 17 34 54.80 +06 49 21.9 10.5 N XXX
CK12X010 KC2014 01 22.88646 17 34 56.35 +06 49 16.4 10.5 N XXX
CK12X010 KC2014 01 22.89493 17 34 57.83 +06 49 10.8 10.5 N XXX
CK12X010 KC2014 01 22.90584 17 34 59.73 +06 49 00.5 10.4 N XXX
CK12X010 KC2014 01 22.91481 17 35 01.39 +06 48 57.2 10.5 N XXX
CK12X010 KC2014 01 22.92573 17 35 03.33 +06 48 49.4 10.5 N XXX
The images were split into R, G, and B channels after full calibration performed, then compartmented into groups and stacked in Astrometrica with registration on the comet's motion so as to increase the SNR of the comet.
Photometric measurements were completed with the G channel images by APER.pro:
ZP = 20.6026+-0.1043 aper mag emag
2.0 11.868+-0.106
4.0 10.779+-0.105
6.0 10.277+-0.105
8.0 9.966+-0.105
10.0 9.761+-0.105
12.0 9.611+-0.105
14.0 9.492+-0.105
16.0 9.392+-0.105
18.0 9.302+-0.105
20.0 9.227+-0.105
22.0 9.162+-0.105
24.0 9.108+-0.105
26.0 9.067+-0.105
28.0 9.039+-0.105
30.0 9.016+-0.105
32.0 8.999+-0.105
34.0 8.985+-0.105
36.0 8.976+-0.105
38.0 8.965+-0.105
40.0 8.957+-0.105
42.0 8.949+-0.105
44.0 8.945+-0.105
46.0 8.949+-0.105
48.0 8.961+-0.105 aper (aperture) in pix.
15 comparison stars with color indexes similar to Sun's were taken from catalog APASS. The V band mags were exploited to solve the zero-point of the image. The plot of multiaperture photometry, with $m_\infty$ solved:
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Copyright © Man-To Hui 2014/01/26
Feel free to e-mail me with any doubts or questions.
