Go Back   IceInSpace > General Astronomy > Observational and Visual Astronomy
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #1  
Old 21-04-2008, 11:32 AM
fringe_dweller's Avatar
fringe_dweller
on the highway to Hell

fringe_dweller is offline
 
Join Date: May 2005
Location: Adelaide
Posts: 2,623
nova in sag

I'm surprised no one bothered to mention this one?

http://www.universetoday.com/2008/04...n-sagittarius/
Reply With Quote
  #2  
Old 24-04-2008, 02:31 PM
ngcles's Avatar
ngcles
The Observologist

ngcles is offline
 
Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,664
Now naked eye

Hi Fringe Dweller & All,

This classical nova event is now a faint naked-eye object (simple binocular target) at he following position:

RA 18 05 58.9 Dec-27 13 56 and was measured on Aprl 23.12 UT at mag +5.65.

It is in the same field with the very faint and difficult G.C NGC 6540, about 1/2 degree NNW of the cluster.

Best,

Les D
Contributing Editor
AS&T
Reply With Quote
  #3  
Old 25-04-2008, 04:51 PM
fringe_dweller's Avatar
fringe_dweller
on the highway to Hell

fringe_dweller is offline
 
Join Date: May 2005
Location: Adelaide
Posts: 2,623
Thankyou Les! naked eye Nova's, even faint ones, used to generate a bit more interest in times past *scratches head*
Reply With Quote
  #4  
Old 28-04-2008, 09:38 PM
Greg Bryant
AS&T Editor

Greg Bryant is offline
 
Join Date: Dec 2004
Location: Sydney
Posts: 352
Hi Kearn,

Keep in mind that this nova was not naked eye to begin with. It got some hype, but really didn't reach the threshold for general amateur interest.

Having been a subscriber to the IAU service for nearly 2 decades, I use to run the "Astrocard" service for the Astronomical Society of New South Wales, from 1991 up until a few years ago when it was folded. At its peak, it had several hundred keen amateurs interested. Even then, a 5th magnitude comet would be of far more interest than a 5th magnitude nova, as an example.

A nova really needs to get a few magnitudes brighter than 6th to warrant popular attention.

Regards,
Greg
Reply With Quote
  #5  
Old 29-04-2008, 12:54 AM
fringe_dweller's Avatar
fringe_dweller
on the highway to Hell

fringe_dweller is offline
 
Join Date: May 2005
Location: Adelaide
Posts: 2,623
Hi Greg,
ok, i'm not much of a nova follower, just saw it on my net travels and thought i'd share it here, and i can believe it regarding the comets vs nova's lol! ive had a few doses of the comet fever myself at times!
thanks
Reply With Quote
  #6  
Old 29-04-2008, 02:16 AM
Ian Robinson
Registered User

Ian Robinson is offline
 
Join Date: Jan 2007
Location: Gateshead
Posts: 2,205
Was a time I would have been out there in the cold observing it and recording my estimates of it's visual magnitude , at mag 6 , it's an easy target for my 20x80 binos which is what I would have used rather than the 10" newt.

A comparison chart for it wont be far off if Matty is still on the ball.

Anyone interested in making some actual scientific observations of it might find the AAVSO's chart generator program handy http://www.aavso.org/observing/chart...e=N%20TrA%2008 to produce a chart to get started with until someone makes a better comparison chart. Pretty easy and pretty quick (see attachment), worth bookmarking !!

The idea is to choose two comparison stars of known brightness that the variable / nova is inbetween in brightness , estimate linearly (scale of 4 - 10 increments guessometrically) how far the object's brightness is fainter and brighter than the brighter and fainter comparison stars , not the time and date , and come back for another squiz at it a few hours later , or a the next day , or the next week , depending on how steap the light curve is.
The numbers are magnitudes 102 = 10.2

I'm sure the AAVSO or you local club's variable star group will accept you measurements and forward them to AAVSO or NZASVSS or BAAVSS.

This is a great way for beginner and not so beginner amateurs to actually feel that they are contributing to science in a real way.
Attached Files
File Type: doc Nova Sgr 2008 3 deg FOV.doc (67.5 KB, 11 views)

Last edited by Ian Robinson; 29-04-2008 at 03:02 AM.
Reply With Quote
Reply

Bookmarks


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 On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 04:17 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement