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 Post subject: Comet C/2015 V2 Johnson
PostPosted: Mon Oct 03, 2016 8:34 am 
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Location: Bolton
This comet is quite a difficult target, as it's very low in the North: only 17 degrees above the horizon at 9pm, and sinking lower through the night.
We had some haze low in the North during our recent trip to Norfolk, but on returning to Bolton it was rather clearer last night. And I found that when aiming to the North I can get away without using a LPR filter (which is certainly not the case when pointing South).
I just managed to get five exposures for stacking before the comet "set" behind my shed roof:
Attachment:
File comment: Comet Johnson on 2-Oct. 5x 90-sec using HX916 on 80mm f/4.6
c2015v2_2oct.png
c2015v2_2oct.png [ 370.48 KiB | Viewed 4837 times ]

If I get another chance, I'll start earlier in the twilight and set up my tripod as close to the opposite hedge, so that it can see more sky over the shed!


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Tue Oct 04, 2016 7:30 am 
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Two consecutive clear nights - we're getting spoiled!

Anyway, I did have another go at this comet last night, and setting up my tripod with two legs on the lawn and one in the flowerbed had it in sight for much longer:
Attachment:
File comment: Comet Johnson on 3-Oct. 50x 1-min using MX716 on C8 at f/3.3.
c2015v2_3oct.png
c2015v2_3oct.png [ 95.68 KiB | Viewed 4828 times ]


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Tue Oct 11, 2016 7:02 am 
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I'ts noticeably brighter this week, and last night with no star in the background the tail is clearer to see.
Attachment:
File comment: Comet Johnson on 10-Oct. 64x 1-min using MX716 with C8 at f/3.3
2015v2_10oct.png
2015v2_10oct.png [ 59.33 KiB | Viewed 4795 times ]


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Wed Feb 22, 2017 7:50 pm 
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This comet is still around, getting nearer and larger.
I got an image this morning using a remote telescope in New Mexico (at the time I was at the dentist having a filling repaired!):
Attachment:
File comment: Comet Johnson on 22-Feb. 3x 200-sec with 150mm f/7.3
c2015v2_22feb.png
c2015v2_22feb.png [ 538.11 KiB | Viewed 4322 times ]

It's a 10th magnitude object in Hercules, so would be an early-morning object from here if the skies ever cleared!


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Wed Mar 15, 2017 8:23 am 
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This comet is still in Hercules, so is now well-placed in the early morning sky - but there's bright Moonlight at the moment.
But although it was cloudy in Bolton (and indeed New Mexico!), I did manage to get an image from Tenerife, using the Open University's new COAST robotic telesope:
Attachment:
File comment: Comet Johnson on 15-Mar. 2x 120-sec with 14" SCT (COAST robotic telescope).
c2015v2_15mar.png
c2015v2_15mar.png [ 164.29 KiB | Viewed 4186 times ]
There will be more about this in our April newsletter


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Wed Mar 22, 2017 4:44 pm 
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I got another image back from Tenerife this morning:
Attachment:
File comment: Comet Johnson on 22-Mar. 6x 120s with 14" SCT.
c2015v2_22mar.png
c2015v2_22mar.png [ 177.41 KiB | Viewed 4057 times ]


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Mon Apr 03, 2017 7:36 am 
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I took advantage of another clear night to get an image of this comet:
Attachment:
File comment: Comet Johnson on 2-Apr. 27x 90-sec with MX716 on C8 at f/3.3.
c2015v2_2apr.png
c2015v2_2apr.png [ 178.42 KiB | Viewed 3929 times ]

I had to wait until nearly 11pm for it to rise above the trees to my East, but at least by then the Moon had set, and so the sky was darker.


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Sat Apr 22, 2017 6:47 am 
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This is one of the comets which I mentioned on Tuesday evening.
It's now in Hercules, so well-placed in our evening skies. Last night I caught it for a while after it had cleared the trees, and before the clouds rolled in:
Attachment:
File comment: Comet Johnson on 21-Apr. 13x 90-sec with MX716 on C8 at f/3.3
c2015v2_21apr.png
c2015v2_21apr.png [ 222.7 KiB | Viewed 3745 times ]


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Sun Apr 23, 2017 8:33 am 
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It was a little hazy last night, but at least the comet was clear of the trees by 10:30pm.
Attachment:
File comment: Comet Johnson on 22-Apr. 35x 80-sec with 16IC on 80ED at f/4.6
c2015v2_22apr.png
c2015v2_22apr.png [ 224.42 KiB | Viewed 3717 times ]


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 Post subject: Re: Comet C/2015 V2 Johnson
PostPosted: Wed Apr 26, 2017 11:26 am 
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Last night I managed to see this comet (in the eyepiece, rather than on a CCD).
I was at a dark site in the Wye Valley, using a little 130P Newtonian on a Celestron NexStar Alt-Az mount.
My site has a good view to the East, so I could do a quick 2-star alignment on Vega and Arcturus soon after 10pm, and then linking SkySafariPlus on my Nexus7 tablet to the mount via BlueTooth, I sent it to the comet's position.
It was quite distinct in the eyepiece, a little smaller and fainter than the M51 Whirlpool Galaxy (although the latter was much higher in the sky).

I also had a good look for comet 41P: I found the surrounding stars OK, but couldn't make out the comet itself. It was lower in the sky, and I know that it's very diffuse.


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