It is currently Tue Oct 17, 2017 4:00 am


Post new topic Reply to topic  [ 12 posts ] 
Author Message
 Post subject: Interesting New Comet
PostPosted: Thu Aug 03, 2017 9:41 am 
Offline

Joined: Sun May 11, 2008 6:11 pm
Posts: 2784
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


Top
 Profile Send private message  
 
PostPosted: Wed Aug 09, 2017 10:11 am 
Offline

Joined: Thu Dec 20, 2007 11:41 am
Posts: 250
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.

_________________
Thanks to the clear cold nights...


Top
 Profile Send private message  
 
PostPosted: Sun Aug 13, 2017 8:13 am 
Offline

Joined: Sat Jan 26, 2008 4:03 pm
Posts: 381
Location: Galloway, SW Scotland
Interesting...my appetite is wetted! Thanks, Mike.


Top
 Profile Send private message  
 
PostPosted: Mon Aug 14, 2017 7:59 pm 
Offline

Joined: Tue Jun 12, 2007 1:13 pm
Posts: 797
Location: Dudley
Thanks, I'll watch out for that one.

_________________
250px dob
200p
10x50 Helios
15x70 Celestron


Top
 Profile Send private message  
 
PostPosted: Mon Aug 28, 2017 10:02 am 
Offline

Joined: Sat Jul 24, 2004 12:12 pm
Posts: 1043
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.


Top
 Profile Send private message  
 
PostPosted: Tue Sep 12, 2017 11:28 am 
Offline

Joined: Sat Jan 26, 2008 4:03 pm
Posts: 381
Location: Galloway, SW Scotland
Thanks, Robin. I expect I'll get it in my 14".


Top
 Profile Send private message  
 
PostPosted: Sun Sep 17, 2017 6:34 am 
Offline

Joined: Sun May 11, 2008 6:11 pm
Posts: 2784
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.


Top
 Profile Send private message  
 
PostPosted: Wed Sep 20, 2017 10:05 pm 
Offline

Joined: Sat Jul 24, 2004 12:12 pm
Posts: 1043
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


Top
 Profile Send private message  
 
PostPosted: Thu Sep 21, 2017 5:17 am 
Offline

Joined: Sun May 11, 2008 6:11 pm
Posts: 2784
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


Top
 Profile Send private message  
 
PostPosted: Sat Sep 30, 2017 3:09 pm 
Offline

Joined: Sat Jan 26, 2008 4:03 pm
Posts: 381
Location: Galloway, SW Scotland
Noticed on Heavens Above a claim of magnitude 5.5 now! :D

Was planning to have a look late yesterday evening as it is now placed very nicely between Perseus and Auriga, but a devilish, sudden cloud up only minutes before my planned session thwarted my hopes.

Clear sky forecast this evening, though, so hopefully attempt two will be successful! :P


Top
 Profile Send private message  
 
PostPosted: Sat Sep 30, 2017 9:16 pm 
Offline

Joined: Sat Jul 24, 2004 12:12 pm
Posts: 1043
Location: Flackwell Heath, Bucks, UK
Good luck -- I think it is more like mag 10 than 5.5, unless it has brightened massively in the past few days.

I took another photo from Kelling Heath using the Atik CCD, which I have posted in the Gallery.


Top
 Profile Send private message  
 
PostPosted: Sun Oct 01, 2017 6:58 am 
Offline

Joined: Sat Jan 26, 2008 4:03 pm
Posts: 381
Location: Galloway, SW Scotland
Thanks, Robin, I needed your luck. beautifully clear skies (pity about the moonlight and low elevation), but could I find it? Nice images you've captured, by the way.

First of all, I scanned in my 9x63 binos. I then used the 14" Dob, normally a satisfactory tool for even small, mag 10 comets. But no, after about half an hour, I decided to look for something more interesting!

I'll have another go in a week or so, maybe.


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group