Now and then we have the chance to witness a Comet. Here are some examples from the last couple of years. A few displayed both a nice ion tale and a nice dust tale. However most are quite tiny, especially when viewed from the city.
Comet 21P / Giacobini-Zinner on Sep 16, 2018, at 00:01 UT. The comet passed just beneath the open clusters Messier 35 and NGC 2158.
Comet Pan-STARRS C2011L4 on March 15, 2013.
Comet Pan-STARRS C2011L4 on March 14, 2013. From Downtown Stockholm.
Comet LOVEJOY C2013R1 on Dec 21, 2013. First Lovejoy comet.
Comet LOVEJOY C2013R1 on Dec 21, 2013. First Lovejoy comet. From my rooftop in old Town.
Comet LOVEJOY C2014Q2 on Feb 10, 2015, from Downtown Stockholm. Second Lovejoy comet.
Comet ISON Nov 2, 2012. C2012 S1.
Comet ISON, C2012 S1. Aligned on comet.
The Great Comet of 1997! Comet Hale-Bopp on April 4, 1997.
Comet Hale-Bopp on March 8, 1997.
The rotating core of comet Hale-Bopp on April 4, 1997. The core produced shockwaves by the rotating material ejections.
Comet Hale-Bopp on April 5, 1997. B/W film.
Comet Ikeya-Zhang 2002 April 17. This comet showed hues of both green and blue.
Neowise 16-17 July
Comet NEOWISE was a fairly difficult object to get a good view of, at my high latitude of about 60 degree north, with no darkness at all during July. However, it was very strong, so the core was an easy target.
Neowise Core July 16-17 North up
The imaging of the core gave this variation in colors. Interesting with the reddish part at the bow front, and more greenish-bluish towards the tail.
NEOWISE July 23-24 images 45-53
NEOWISE at end of July, when the comet was closest to earth. This is 9 images combined, with various amount of noctilucent clouds passing by at the time of the exposures. The ion tail is visible! The night sky was still not dark, just twilight all night!
www.galaxies.se - Ivar Hamberg - Updated 2023, Oct 30.