It is currently Mon Feb 19, 2018 3:23 pm

All times are UTC




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Three views of comet 174P/Echeclus
PostPosted: Sat Dec 16, 2017 11:20 am 
Offline
Member
User avatar

Joined: Mon Oct 12, 2009 6:47 pm
Posts: 1248
Location: Bolton
This comet seems unusually prone to outbursts, where it suddenly becomes much brighter than usual (probably due to outgassing of volatiles). This can be seen from the light-curve on Seiichi Yoshida's web-page: http://www.aerith.net/comet/catalog/0174P/2000EC98.html

Image

This week, after reading that it had flared up again, I managed to get an image from New Mexico:
Attachment:
File comment: The comet from New Mexico on the morning of 15-Dec (our time). 2x 170-sec with 250mm f/3.4 refractor.
174p_15dec.png
174p_15dec.png [ 226.84 KiB | Viewed 421 times ]

And then as it's high in our evening sky (in Pisces), I was also able to catch it from Bolton:
Attachment:
File comment: The comet from Bolton that same evening. 31x 90-sec with MX716 on C8 at f/3.3.
174p_15dec.png
174p_15dec.png [ 209 KiB | Viewed 425 times ]

This comet is moving so slowly across the sky that it appears against the same star-field in both images, taken around twelve hours apart.
And I'm gratified to see that I've picked up a similar number of the background stars from Bolton as I did from New Mexico (albeit with an integrated exposure time eight times longer).

Then a couple of hours later, the request which I'd placed on the COAST job-queue two days before ran too:
Attachment:
File comment: The comet later the same evening, this time from Tenerife. 3x 150-sec using C14 at f/10.
174p_15dec.png
174p_15dec.png [ 137.77 KiB | Viewed 421 times ]


Top
 Profile  
 
 Post subject: Re: Comet 174P/Echeclus
PostPosted: Wed Dec 27, 2017 11:36 am 
Offline
Member
User avatar

Joined: Mon Oct 12, 2009 6:47 pm
Posts: 1248
Location: Bolton
A couple of weeks later it appears to have got larger but more diffuse:
Attachment:
File comment: Comet 174P on 26-Dec. 3x 150-sec with C14 f/10.
174p_26dec.png
174p_26dec.png [ 214.7 KiB | Viewed 336 times ]


Top
 Profile  
 
 Post subject: Re: Three views of comet 174P/Echeclus
PostPosted: Thu Jan 11, 2018 9:36 pm 
Offline
Member
User avatar

Joined: Mon Oct 12, 2009 6:47 pm
Posts: 1248
Location: Bolton
That "outburst" material from a few weeks back still seems to be spreading, and so becoming even fainter:
Attachment:
File comment: Comet 174P on 10-Jan. 3x 150-sec with C14 at f/10.
174p_10jan.png
174p_10jan.png [ 378.29 KiB | Viewed 266 times ]


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 0 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 © 2000, 2002, 2005, 2007 phpBB Group