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Old 18-04-2010, 04:44 PM
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A Nova in Sagittarius?

I made an animated gif of last years and a couple of nights ago images of the Lagoon Trifid region and there is a 'new' star. It could be a variable.

Here is a crop of the animated gif 4.5MB

http://d1355990.i49.quadrahosting.co...10_04/lt02.gif


There are also a couple of variables I think. The 'nova' is at top near center. The new star is in the image from Thursday night 15-04-2010.

I used Registar to match the two images in brightness contrast etc with the calibrate function.

Bert

Last edited by avandonk; 18-04-2010 at 07:27 PM.
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Old 18-04-2010, 04:47 PM
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Yes, nice red one It is most likely a var (since it was there last year)
Do you have those phone numbers to call ?
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Old 18-04-2010, 04:50 PM
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Actually, now I see two of them, when one is ON the other one is OFF...
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Old 18-04-2010, 04:51 PM
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Bojan there is also an extra red star to the left of the Trifid Neb. The one dissapearing below the Trifid is a variable.

The really bright one is near top just to right of center.
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Old 18-04-2010, 04:55 PM
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Good find. It looks the business.
Email them.
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Old 18-04-2010, 04:58 PM
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Quote:
Originally Posted by avandonk View Post
Bojan there is also an extra red star to the left of the Trifid Neb. The one dissapearing below the Trifid is a variable.

The really bright one is near top just to right of center.
I see it...
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Old 18-04-2010, 05:03 PM
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You have another one..
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Old 18-04-2010, 05:17 PM
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Bojan I am uploading the full image animated gif. It is 40MB but once it has loaded into your browser just click on any area and it will display at 100% pixel size.

There seem to be more. The image with the brighter trifid center and dimmest stars showing better is the latest image.

Fun for all the family spot the changes. My eyes are very tired after a long process. This was meant to be a quick bit of fun.

Bert
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Old 18-04-2010, 05:34 PM
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That's Cool Birt, and Bojan for pointing them out
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Old 18-04-2010, 05:46 PM
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Hi Bert - Nothing at all showing in that position in MAMA 1 SERC image accessed in Aladin (see overlay below). Funny thing is, I have sets of images of this area (at wider scale), for 11, 13, 16 April and there is little showing there at the sort of brightness you're showing. But the sub for the 16th does seem to show something faint there, in the rough position as far as my sub-standard widefields allow, LOL! My shots aren't deep - taken to find bright objects mag 7-10.

Don't know how long you were imaging for - you'd expect an asteroid to move if subs were taken over an appreciable time.

Good luck!

Cheers -
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Old 18-04-2010, 05:56 PM
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Well Done Birt
Cheers,
Duncan
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Old 18-04-2010, 06:34 PM
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For some reason the large image won't download for me

here it is anyway 40MB

Now gone


I will make a smaller one

Bert

Last edited by avandonk; 18-04-2010 at 07:22 PM.
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  #13  
Old 18-04-2010, 06:52 PM
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This one will 8MB
http://d1355990.i49.quadrahosting.com.au/2010_04/3k.gif

The image took 1.5 hours to collect. An asteroid would have disappeared with median stacking.

Just checked the 2m subs it is in all of them.




Bert

Last edited by avandonk; 18-04-2010 at 07:11 PM.
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  #14  
Old 18-04-2010, 07:35 PM
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I just realized that these images were collected on Saturday 17-04-2010 early morning from 3AM to 5.30AM twilight start as this region is not visible to me until after midnight.

I looked at the wrong directory for the dates.

Sorry about the confusion.

So Rob_k that fits in with your image. The nova was most probably brightening when you almost caught it.

I do not mind who notifies the relevant people. I have been up for three nights in a row and nearly out of fuel.

The important thing is to verify it is real and not a variable or slow asteroid etc.

Bert
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  #15  
Old 18-04-2010, 10:09 PM
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You are correct Bert a slow moving asteroid.

The one I see blinking "near top just to right of center" is to the right (south) of centre near a red star in the first image and this is Asteroid 27 Euterpe at mag 11.8. Approx 2.1AU from Earth at present. The 27th asteroid to be discovered - Euterpe - the Muse of music in Greek Mythology. Discovered in 1853 by J.R. Hind (discoverer of Hind's variable nebula and Hind's crimson star) at London. Assumed diameter 262km, currently moving at a slow 4.86 arc sec per hour.

The variable red star below the nebula is V1951. Max 8.3 mag / Min 14.8, period 510 days and is in the GCVS.

Good pick up and very lovely images as per usual.

PeterM.

Last edited by PeterM; 18-04-2010 at 11:49 PM.
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  #16  
Old 18-04-2010, 11:01 PM
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Amazing and interesting stuff.
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  #17  
Old 18-04-2010, 11:24 PM
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Quote:
Originally Posted by PeterM View Post
You are correct Bert a slow moving asteroid.

The one I see blinking "near centre at top " is just to the right (south) of centre near a red star in the first image and this is Asteroid 27 Euterpe at mag 11.8. Approx 2.1AU from Earth at present. The 27th asteroid to be discovered - Euterpe - the Muse of music in Greek Mythology. Discovered in 1853 by J.R. Hind (discoverer of Hind's variable nebula and Hind's crimson star) at London. Assumed diameter 262km, currently moving at a slow 4.86 arc sec per hour.

The variable red star below the nebula is V1951. Max 8.3 mag / Min 14.8, period 510 days and is in the GCVS.

Good pick up and very lovely images as per usual.

PeterM.
Excellent stuff Peter! I've lost my asteroids from Starry Night, and can't seem to reload them. Bit of a pain in situations like this.

Cheers -
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  #18  
Old 19-04-2010, 08:52 AM
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Thanks for that Bojan, PeterM and Rob_K I do not have the resources to check these things.

I suppose the take home message is to explore any possibility apart from the obvious.

I am clouded in and had no way to take more images to see if the new 'star' had moved.

It was far better to get others involved that have far more expertise or clear skies.

Bert
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Old 19-04-2010, 11:02 AM
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Thanks Birt, it was great watching this saga unfold
It shows the skills of the people on this site
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  #20  
Old 19-04-2010, 12:15 PM
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Got a shot last night, and for what it's worth, here's a rough animation of the asteroid's movement from 16 to 18 April 2010.

Cheers -
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