Reply
 
Thread Tools Display Modes
  #1  
Old 01-10-2020, 02:25 AM
jerez is offline
Guest
 
Join Date: Jan 2014
Posts: 570

2I/Borisov: latest observations?


Anyone hear of any recent observations of 2I/Borisov? It's an interstellar comet (the first was Oumuamua) that was supposed to reach its closest point to earth on December 28th. There doesn't seem to be any new information on the NASA site or elsewhere. Is it too soon to expect to see news? Can we expect to see better images?
  #2  
Old 01-13-2020, 01:39 AM
jerez is offline
Guest
 
Join Date: Jan 2014
Posts: 570
Bumping this in case it went unnoticed.
  #3  
Old 01-13-2020, 06:04 AM
Darren Garrison's Avatar
Darren Garrison is offline
Guest
 
Join Date: Oct 2016
Posts: 12,460
Other than it's origin, it was a very boring and ordinary comet.
  #4  
Old 01-13-2020, 06:43 AM
dtilque is online now
Charter Member
 
Join Date: Jan 2000
Location: My own private Nogero
Posts: 7,433
Which is what astronomers expect from such interstellar bodies. Differences from Solar System comets are expected to show up in isotope ratios, which will require analysis of its spectrum.
  #5  
Old 01-13-2020, 06:56 AM
Darren Garrison's Avatar
Darren Garrison is offline
Guest
 
Join Date: Oct 2016
Posts: 12,460
Quote:
Originally Posted by dtilque View Post
Differences from Solar System comets are expected to show up in isotope ratios, which will require analysis of its spectrum.
In which it was a very boring and ordinary comet.
  #6  
Old 01-13-2020, 07:27 AM
dtilque is online now
Charter Member
 
Join Date: Jan 2000
Location: My own private Nogero
Posts: 7,433
Quote:
Originally Posted by Darren Garrison View Post
Based on the abstract of that paper, they were only analysing for molecular composition, (e.g. CN, C2, OH) but not isotope ratios (e.g. hydrogen/deuterium, 16O/18O). A quick google search does not produce a paper on this topic.
  #7  
Old 01-13-2020, 07:50 AM
Darren Garrison's Avatar
Darren Garrison is offline
Guest
 
Join Date: Oct 2016
Posts: 12,460
Fine--in some obscure isotope ratio this comet may be very slightly different enough from any ordinary solar system comet that some subset of astrochemists will be pretty excited about the results. That good enough for you?

Last edited by Darren Garrison; 01-13-2020 at 07:50 AM.
  #8  
Old 01-13-2020, 08:11 AM
dtilque is online now
Charter Member
 
Join Date: Jan 2000
Location: My own private Nogero
Posts: 7,433
Quote:
Originally Posted by Darren Garrison View Post
Fine--in some obscure isotope ratio this comet may be very slightly different enough from any ordinary solar system comet that some subset of astrochemists will be pretty excited about the results. That good enough for you?
That would actually be surprising. Interstellar comets should have significantly different isotope ratios, so one being almost the same as Solar System comets would be unexpected.

I'm not an expert, but it may be that Borisov is not bright enough to do isotopic analysis on. The differences in the spectra of isotopes is much more subtle than those between different molecules and atoms. So you need a brighter spectrum to do the analysis.
  #9  
Old 01-13-2020, 11:11 AM
jerez is offline
Guest
 
Join Date: Jan 2014
Posts: 570
Maybe someone can answer one or more of the three questions in my post:

Anyone hear of any recent observations of 2I/Borisov?

Is it too soon to expect to see news?

Can we expect to see better images?


That'd be swell.

Last edited by jerez; 01-13-2020 at 11:11 AM.
  #10  
Old 01-13-2020, 12:27 PM
dtilque is online now
Charter Member
 
Join Date: Jan 2000
Location: My own private Nogero
Posts: 7,433
The latest news I've heard was from a month ago: Hubble images. I doubt if we'll get much better images, since it's not getting closer to Earth. And I'm not sure what kind of news you're expecting.
  #11  
Old 01-13-2020, 12:38 PM
Darren Garrison's Avatar
Darren Garrison is offline
Guest
 
Join Date: Oct 2016
Posts: 12,460
Quote:
Originally Posted by jerez View Post
Maybe someone can answer one or more of the three questions in my post
I did answer your question. The site I linked (NASA itself) is the best picture that there is and that there is going to be. And--as I have been pointing out--it is behaving like a perfectly ordinary local comet, so nothing in the image is going to look different from any other not especially bright, not especially close to Earth comet. What "news" are you hoping for?
  #12  
Old 01-14-2020, 02:43 AM
jerez is offline
Guest
 
Join Date: Jan 2014
Posts: 570
Quote:
Originally Posted by dtilque View Post
The latest news I've heard was from a month ago: Hubble images. I doubt if we'll get much better images, since it's not getting closer to Earth. And I'm not sure what kind of news you're expecting.
Thank you for your response.
  #13  
Old 01-14-2020, 10:04 AM
Grey is offline
Guest
 
Join Date: Sep 2002
Location: Ottawa, Canada
Posts: 6,845
If in fact isotopic ratios are the same, or very close, to our in-system comets that's fascinating. It potentially means the comet came from a system born out of the same stellar cradle as our sun.
__________________
"When they discover the centre of the universe, a lot of people will be disappointed to discover they are not it." : Bernard Bailey
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:43 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

Send questions for Cecil Adams to: cecil@straightdope.com

Send comments about this website to: webmaster@straightdope.com

Terms of Use / Privacy Policy

Advertise on the Straight Dope!
(Your direct line to thousands of the smartest, hippest people on the planet, plus a few total dipsticks.)

Copyright 2019 STM Reader, LLC.

 
Copyright © 2017