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PostPosted: Sat Feb 09, 2019 8:16 am 
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Joined: Sun May 11, 2008 6:11 pm
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Yes! Found it! Hooray!
Comet Iwamoto C/2018 Y1: Saturday 9th February 2019 : 0125-0215 + 0305 UT. Clouds finally cleared after a very stormy, windy friday here in the land of the South Saxons, leaving a very clear, cold early morning Saturday, with a few bits of occasional cloud . Still windy but was sheltered from this by the house, as I set up the tripod with Nikon 25-45x60 spotting scope in the garden. Not too much in the way of local light pollution after midnight.The field stars of tau Leonis (fl. 84), and including fl.83, fl,82 and fl.80 made a nice guiding asterism, and was fairly high in the south. Soon noticed the rather faint indistinctly-edged rather small fuzzball a little below fl.80, and found that it was easier to see if the scope was zoomed up about half-way. (Could be seen in Acuter 15x65 spotter but better with higher magnification of Nikon.) Made a lttle sketch of the asterism + comet and towards the end, considerable motion was detected up to the right to pass fl.80. Comet at present not very obvious but not that difficult to see in the scope with enough magnification, although would seem to require a good sky and not too much light pollution. Regards maf


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PostPosted: Sat Feb 09, 2019 9:58 am 
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Joined: Mon Jan 09, 2006 11:05 am
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Location: Lancashire
Well done Mike to have found the comet so quickly. We'll have to wait until 3399 AD for its next return. More on www.spaceweather.com .

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PostPosted: Sat Feb 09, 2019 5:01 pm 
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Location: Manchester
Mike
Nice one - well done.
Best of luck from Cliff


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PostPosted: Sat Feb 09, 2019 6:32 pm 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Thank you to Cliff and Brian for your kind words. The main thing was of course the luck with the weather. During the previous afternoon I had the need to go from Portslade, through Southwick and Shoreham, to Lancing to deliver a birthday card and present , and then along to Worthing. With the old person's bus pass, this can be done for free on a no.700 bus. This goes along the coast and wind was blowing a gale and battering the bus on the way. However, fortunately during the early hours of Saturday we had a miraculously clear spell which was actually forecast and, so realising that the comet might be locatable, did some preliminary research before going to bed. And it paid off! Regards maf.


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PostPosted: Sat Feb 09, 2019 9:41 pm 
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Joined: Mon Jan 18, 2010 9:25 am
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It would not surprise me if there are some reports of unaided eye observations of the comet.
Despite what the link above says.

And yes well done Mike, although I expected you to see it with good weather.

Regards,
David


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PostPosted: Sun Feb 10, 2019 8:20 am 
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Joined: Sat Jan 26, 2008 4:03 pm
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Location: Galloway, SW Scotland
Well done, Mike; I can feel your joy! And you have enthused me to have another go; I swung my telescope towards it the other night and started the search, but an unkind, low cloud-bank crept in.


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PostPosted: Sun Feb 10, 2019 7:43 pm 
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Joined: Fri Dec 03, 2004 9:58 pm
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Location: Wellingborough
Yes, well-done Mike :D

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Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
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PostPosted: Sun Feb 10, 2019 10:42 pm 
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Location: Wellingborough
Have just been out for a look using 10x50 Pentax. At the moment 53 Leo is a good locator for C/2018 Y1, being only half a degree east of the comet.

I dark adapted for about 15 minutes indoors with eyes covered, no lights, and found 2018 Y1 was just visible as a faint greyish patch at times, on the boundary of visibility in the 10x50s.

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Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed


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PostPosted: Mon Feb 11, 2019 8:07 am 
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Joined: Sat Jan 26, 2008 4:03 pm
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Location: Galloway, SW Scotland
Saw it at around midnight, myself, when clouds obligingly opened a chasm of excellent mag 6+ sky for about an hour. Found it in less than a minute; it was an easy catch in my Dob's 9x50 finder and conveniently located next to two stars, perfect focusing aids!

At 66x, a quite large coma was visible with a bright little spot at its centre, the coma fanning out to one side (sorry, I've forgotten which!) to an extent of about 12 minutes of arc. No tail was visible.

Adding an UHC filter improved the view, as did a jump to a magnification of 110x. Was there some condensation around the psuedo-nucleus?

Removing the filter and moving up to 200x showed that there definitely was, to the north of the psuedo-nucleus an appreciable area showed denser spots, a fact confirmed at 330x and 400x.

All in all, quite a rewarding little comet – thanks for the reminder, Mike!


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PostPosted: Mon Feb 11, 2019 8:16 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Sunday-Monday, 2345-0020 UT (midnight). 10th-11th February: Located 53 Leonis, up from rho Leonis and its adjacent asterism. Star fl.53 makes a triangle with two fainter stars and to the right were three faintish (8th magnitude ?) stars and the fuzz-ball of Comet Imamoto making a figure like a diminutive "bowl of the big dipper" or "body of the great bear". The comet seen possibly somewhat larger and more obvious than previously but still with the vaguest of edge. The sky was of good transparency although bits of cloud drifted by and was finally clouded out. Used the Nikon 15-45x60 spotter from the back garden which was pretty dark, everyone having gone to bed. Then thought that I would try with the Bresser 10x50, handheld but rested, and was able to see the fuzzy patch of the comet in that (as Brian also reported here, and Nigel, well done chaps!). Then tried my 8x40 binoculars, and could just about see it in that too! (Obs.#2) Regards maf

Monday morning, 11th February, 0540 UT breakfast time: wandered into the front room which was in darkness and noticed that Leo was still up but heading for the hills, Southwick Hill! Just on the off chance, I turned the scope on it through the window and managed to locate the three stars of the "false dipper" but the comet had, by then shifted considerably to the right, but then did manage, with a little difficulty, to just pick it out despite the light pollution in the front of the house. (Obs.#3) Regards maf


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PostPosted: Mon Feb 11, 2019 9:03 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Nigel :Very interested to hear in all the extra details visible in the larger optics. Regards maf.


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PostPosted: Mon Feb 11, 2019 5:21 pm 
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Location: Galloway, SW Scotland
You're welcome, Mike. I enjoy a two pronged experience, first the wide view at 66x and then the zoom in.

It's moving quickly through our skies, this one!

Happy observing,

Nigel


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PostPosted: Mon Feb 11, 2019 7:11 pm 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Indeed Comet Imamoto is really shifting. Each time I go to look for it I have to spend a bit of research time on the new starfield I will need to recognise. That makes it interesting though.
Completely different from Comet Holmes which no doubt you will remember that stayed in the Perseus for the whole time that it was bright!
Regards maf


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PostPosted: Tue Feb 12, 2019 1:44 am 
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Location: Flackwell Heath, Bucks, UK
My site on the London side of High Wycombe is not great for faint objects, though we are right on the edge of the Chilterns AONB. While the camera was taking some driven shots I took a look with 10 x 50 and 16 x 50 bins just after midnight on the 12th. Iwamoto was only faintly visible using averted vision with the 10 x 50s, and I probably wouldn't have spotted it if I hadn't known it was there. But with the 16 x 50s it was fairly obvious, though by no means bright.
Robin


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PostPosted: Tue Feb 12, 2019 8:06 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
11th-12th February, 2355-0050 UT: Clouds cleared to give a good clear sky. First used Nikon 15-45x60 spotter from the back garden and later the Acuter 15x65 spotting scope. Located working up from Regulus via fl.34, fl.37 to fl.42 Leonis. Comet Iwamoto was a little below fl.42 and adjacent to a neat pair of 8th magnitude stars. It appeared as the usual very indistinctly-edged fuzzball, easily seen in the zoomed up Nikon, and also in the Acuter 15x65, which I then used as it has the advantage of a 45 degree eyepiece and Leo was now high up. I found comet reasonably easy to locate in Bresser 10x50 binocular too. Compared the Comet, using the Acuter, with the nearby M53 in Coma Berenices. The globular cluster appeared 'sharper' but much smaller than the fuzzy comet. (Obs.# 4) Regards maf.


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