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 Post subject: Interesting New Comet
PostPosted: Thu Aug 03, 2017 9:41 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
While idly scanning the Internet I came across a new comet which might reach magnitude 7.5 in a few months. It was discovered by one of the acronymed search programmes: this one called ASAS-SN (or "Assassin) consisting of two separate units called (rather amusingly) "Brutus" and "Cassius". ASAS-SN is an acronym for "All sky Automatic Survey for Supernovae", and Comet is called C/2017 O1, regards maf


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PostPosted: Wed Aug 09, 2017 10:11 am 
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Location: Bruges (just over Channel)
Right!
Named ASASSN1, official name C/2017 O1.
Some estimates worldwide give 10.0-10.5, it is now a real morning comet, before the twilight still low, now 25 degrees, but climbing! In October reaching zenith (!) and probably mag. 8.

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PostPosted: Sun Aug 13, 2017 8:13 am 
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Location: Galloway, SW Scotland
Interesting...my appetite is wetted! Thanks, Mike.


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PostPosted: Mon Aug 14, 2017 7:59 pm 
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Location: Dudley
Thanks, I'll watch out for that one.

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PostPosted: Mon Aug 28, 2017 10:02 am 
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Location: Flackwell Heath, Bucks, UK
I've just posted a photo of the comet on the Gallery, and also on the main SPA news story, which also gives a track and full ephemeris:
http://www.popastro.com/news/newsdetail.php?id_nw=559.


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PostPosted: Tue Sep 12, 2017 11:28 am 
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Location: Galloway, SW Scotland
Thanks, Robin. I expect I'll get it in my 14".


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PostPosted: Sun Sep 17, 2017 6:34 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Sunday 17th Sept. 2017; 0200-0215 BST. From back garden, using Acuter 65mm with 20mm ep.= x19 , then 12.5mm ep. =x30 . Conditions were good, with no moonlight. Found the various 8.5 to 9.7 magnitude field-stars shown on map 78 of Uranometria, but was unable to see this comet (C/2017 O1 Asassn) even as just a faint star. regards maf.


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PostPosted: Wed Sep 20, 2017 10:05 pm 
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Location: Flackwell Heath, Bucks, UK
Just posted an image from Kelling Heath in the Gallery:

http://popastro.com/forum/viewtopic.php?f=11&t=20459&sid=37aba45f6f3019ae0c6b671b5b642e9b

I'd guess that it's more like mag 10 than mag 8, so not an easy visual object. I didn't try finding it visually as I had the camera attached.

Robin


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PostPosted: Thu Sep 21, 2017 5:17 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
Thank you, Robin, for you posting, indeed, as you said, "it doesn't look as though it will be a binocular object just yet!". All the recent "so-called bright binocular" comets have been very hard to see in small optics. regards maf


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