Comet 46P/Wirtanen
Taken by Mieczyslaw Leszek Paradowski on November 30, 2018 @ Guzówka, Poland
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  Camera Used: Unavailable Unavailable
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Details:
Canon 450D digital camera, 1600 ASA, stack of 14x120s exposures. Camera lens Jupiter 37A (russian) f=135mm/3.5 @f/4. Star Adventurer equatorial mount. Clear sky but very cold: minus 13 Centigrades (-13 C) and wind from the east. The digital camera Canon 450D and Star Adventurer equatorial mount worked well despite very low temperature. The stacked image is
biased and dark subtracted, as well as flat-fielded using Deep Sky Stacker software. The measured comet magnitude m1=4.80 +/-0.03 at Dia.=59.6 taking 3 reference stars near the comet from Tycho-2 catalog and using IRIS software. Elongated the central condensation is caused by movement of the comet equal to 29 pixels per hour in PA=24 degrees.
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