Comet Wirtanen

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Comet Wirtanen

Postby Aratus » Fri Nov 30, 2018 12:15 am

29th November 2018
Comet Wirtanen is climbing out of the murky horizon, and the moon is keeping back for a while. However clouds insisted on making an appearence too, making this a very frustrating observing session.

The comet was 13 degrees above the horizon when I took this 60 sec photo. It isn't particulary bright at the moment, especially being so low down. However it did look distinctly green! I could see no tail. I would estimate about 8th magnitude. Let's hope it brightens up soon.

Image

The comet was moving fairly quickly against the background stars. Here is a double exposure showing the movement over about half an hour.

Image
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: Comet Wirtanen

Postby Aratus » Fri Nov 30, 2018 11:51 pm

30th November 2018

A second clear night, and the comet is a couple a degrees higher at 15 degrees. It looks a bit brighter, and the fuzzy bit is clearer given that the sky is slightly less affected by the murk!
Image
It is definitely 'green' and the 'nucleus' is slightly offset within the fuzz, which is the beginning of a tail effect. The photo is a 60sec photo, and taken at exactly the same time as the one yesterday - 2038 UT

I had no problems finding the comet with the goto telescope mount, but I have yet to see it through binoculars. I still think it is about 8th magnitude. The 'bright' star to the left of it is 6th magnitude, and the comet is nowhere near as bright as that star. The star at the bottom is 9th magnitude.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: Comet Wirtanen

Postby Graeme1858 » Sat Dec 01, 2018 7:11 am

The sky was clearer last night here than it's been for a while but very wet in the air. I got the binoculars out but couldn't find the comet. According to Stellarium when it gets to 28° on the 6th it will be near 4th magnitude Azha.
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Re: Comet Wirtanen

Postby Aratus » Sat Dec 01, 2018 2:10 pm

I'm afraid to say it, but I'm getting that familiar feeling of 'comet let down'! :( I'm sorry you didnt get to see it through binoculars, Graeme. It is in an area devoid of bright stars at the moment, but as you say it will be right next to Azha in Eridanus on the 6th December. It might be 6th magnitude by then - if my magnitude estimates are correct - and a lot easier to see. Maybe it will flare up!

If anyone else does see it, or image it, feel free to post here if you wish. I'll keep on observing as the weather allows. Monday is looking good for my location, but pretty bad for the rest of the week.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: Comet Wirtanen

Postby The Man with the Corrugated Iron Roof » Sun Dec 02, 2018 12:20 am

No luck from here yet. Wall-to-wall cloud at the moment.
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Re: Comet Wirtanen

Postby night sky watcher » Mon Dec 03, 2018 10:58 pm

Aratus,

Nice sketch of Comet Wirtansen :) ,

CS,KLU,

Thanks :) ,

Tom
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Re: Comet Wirtanen

Postby Aratus » Tue Dec 04, 2018 12:59 am

Many thanks. I hope people are spotting this comet, but it is still down the murk for me. It will get a lot higher in a week or two. On the 3rd December it was around 20 degrees above the horizon, and the image has improved a lot. I guided a 90sec image. My worry is that if I take a longer exposure the comet will 'trail'.
Image
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
Aratus
 
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Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Comet Wirtanen

Postby Aratus » Sat Dec 08, 2018 12:49 am

7th December 2018

A bit of a cold and blustery evening, but Wirtanen is nearly 30 degrees high now. I was able to see it in binoculars, but the view isn't very good. It is spread out, and the contrast with the sky is poor. It actually looks a lot better through the telescope. The 'nucleus' was a little brighter than before, perhaps more like 6th magnitude. The coma looked more condensed. The green colour was more obvious now it is brighter. It looks larger than previous evenings. By guiding the telescope I was able to get a 120sec exposure, but that did little to increase the contrast with the sky.

Image

I'll try stacking some images tomorrow, even though it will trail the stars. I also have some images I took with the wide-field guidescope that might be worth showing.
Last edited by Aratus on Sat Dec 08, 2018 1:01 am, edited 1 time in total.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
Aratus
 
Posts: 868
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Comet Wirtanen

Postby Graeme1858 » Sat Dec 08, 2018 12:59 am

Wirtanen is up level with Rigel now at 26 deg. It was clear enough to spot the 6th magnitude stars in the area Stellarium says the comet is in binoculars but still no sign of it yet!

Capture.PNG
Capture.PNG (54.4 KiB) Viewed 76 times


I'm hoping to get the telescope unpacked and set up tomorrow so if the clouds stay away I should be able to spot it.
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Miranda 10x50 Binoculars
Celestron CGX 9.25 SCT
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Re: Comet Wirtanen

Postby Aratus » Sat Dec 08, 2018 11:10 am

I looked for it through binoculars on 3 occasions last night. I found it on only 2. For the third I just couldn't find it. It looks like a largish faint circle of cloud. The 'nucleus' wasn't visible, which surprised me. It still isn't near any bright stars for reference, but that will change next week. I not hopeful for Saturday, but Sunday looks good. Good luck.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
Aratus
 
Posts: 868
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

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