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NGC 2261: Hubble's Variable Nebula (ver.2016)

astrophotography reflector
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#1 Oleg Bryzgalov

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Posted 19 February 2016 - 03:32 AM

Like three years ago, starting the new season with a wonderful and enchanting Hubble's Variable Nebula (NGC 2261)

I wanted to personally check whether it still variable ...
It was found that this is so :)

Here animation L-channel 200%:

NGC2261_2013_2016.gif

Of course, 3 years - a very large interval for observing the changes in the nebula. Everything is much faster: http://www.umanitoba...n/analysis.html

 

In 2013-2016 animation, I drew attention to the star just above the nebula, which is for 3 years significantly shifted to the right.
To heighten the effect, combined with the current picture image DSS., For about 60 years, the offset is already pretty decent.

NGC2261_DSS_2016.gif

 

Here http://www.astrosurf...ci/ngc2261.html Italian colleague calculated that the proper motion of the star 0.2" per year. The name is NLTT 16798 and is listed as High Proper Motion Star: http://simbad.u-stra...dent=NLTT 16798

 

This picture was photographed February 4 and 6, 2016 in Khlepcha observatory, Ukraine.

Equipment: home assembled reflector 10 in., f/3.8
Mount WhiteSwan-180 with a control system «Eqdrive Standart», camera QSI-583wsg, Televue Paracorr-2. Off-axis guidecamera QHY5L-II.
LRGB filter set Baader Planetarium.

L = 29 * 600 seconds , bin.1, RGB = 11 * 300-450 seconds, bin.2 each filter. About 8 hours.

FWHM source in L filter 2.10"-2.97", sum in L channel - 2.55"

The height above the horizon from 40° to 48°, the scale of 1"/ pixel.

Processed Pixinsight 1.8 and Photoshop CS6

Link to full image: http://olegbr.astroc...zgalov_2106.jpg

Attached Thumbnails

  • NGC2261_LRGB_Oleg_Bryzgalov_2106_cr.jpg

  • Ricky, Jeremy Perez, Alterf and 10 others like this

#2 Leonardo70

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Posted 19 February 2016 - 04:22 AM

Wonderful Oleg. Congrats.

 

All the best,

Leo



#3 Oleg Bryzgalov

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Posted 19 February 2016 - 05:28 AM

Thank you, Leo :)



#4 nickatnight

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Posted 19 February 2016 - 06:52 AM

Sooo cool. Excellent work!



#5 Rick J

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Posted 19 February 2016 - 02:47 PM

Nicely done. 

 

I've wanted to follow it weekly as changes happen that fast as your link demonstrates but weather has had different ideas for years now.  I'm still waiting for even one try this year.  The motion of that star is even more evident if you go back the the 1949 first light image by Edwin Hubble with the 200" scope.  I had to mirror flip my image to match the 200" prime focus shot (no secondary).  Mirror flips drive my brain into fits of agony but so did flipping the Palomar image with its then reversed caption.  Thankfully they soon published only correctly oriented images.

 

Rick

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  • HVNComparedR1.jpg


#6 WesC

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Posted 19 February 2016 - 05:12 PM

Wow, I love seeing stuff like this! Awesome! :waytogo:


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#7 Oleg Bryzgalov

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Posted 20 February 2016 - 10:25 AM

Rick, thank you very much for the link to your photo.

I did not think to compare my picture with original photos made by Edwin Hubble in 1949.

I took the photos from here: http://www.astro.cal...copes/hale.html and did animation.

Noticeable is very little difference in the position of the other two stars next to the first.

I think that if this is not an error in the alignment of photos, these three stars can be linked by gravitational interaction.

NGC2261_1949_2016.gif


Edited by Oleg Bryzgalov, 20 February 2016 - 10:26 AM.


#8 Oleg Bryzgalov

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Posted 20 February 2016 - 10:27 AM

Wow, I love seeing stuff like this! Awesome! :waytogo:

Thank you :)



#9 Michael Deger

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Posted 20 February 2016 - 12:27 PM

Hi Oleg,

 

excellent image with superb details and colors.

Very interesting animation.

 

All the best

Michael

 

http://www.galaxyphoto.de



#10 HarknessAstro

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Posted 20 February 2016 - 01:07 PM

Awesome shot and how awesome it is to see a STAR moving! Good job!



#11 Oleg Bryzgalov

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Posted 21 February 2016 - 04:03 AM

@Michael Deger

@HarknessAstro

Thank you :)

Oleg.



#12 CCD-Freak

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Posted 23 February 2016 - 04:46 PM

Here is a quick image I grabbed at RMSS a couple years ago.   This is an object I want to spend more time on.  

 

Atik 383L+OSC   4 x 10 minutes

AT8RC on CGE mount

 

Hubble Var Neb-3x3.jpg

 

John

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Edited by CCD-Freak, 23 February 2016 - 04:48 PM.


#13 Tom Polakis

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Posted 25 February 2016 - 11:15 AM

Oleg,

 

This is great.  I was unaware of the high-proper-motion star.  I have been working on a project of imaging short-term changes in NGC 2261 since November, and have accumulated 16 images since then.  When the nebula goes into the sun's glare in April, I'll put it all together into an animation.  Noticeable changes occur in only three or four days.

 

Regarding that star, I put together a similar animation using the 1950 POSS, as you did, and two images that I took in 1999 and 2016.  Then I used the Aladin application to query the star.  Sure enough, it is in a catalog of stars with high proper motion as NLTT 16798.  http://simbad.u-stra...dent=NLTT 16798  Looking up the measurements, it is moving at a yearly rate of 76 milliarcsec in R.A. and -219 mas in Dec.  So that's 232 milliarcsec per year total.  Your animation between 2013 and 2016 is showing less than 1 arcsec of motion.  The longer animations going back to 1950 show a motion of 15 arcsec.

 

Here's my animation showing the proper motion of the star.

 

Tom

 

162648675.6hUBNrPL.ngc2261_66years.gif



#14 tjugo

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Posted 26 February 2016 - 09:32 PM

Oleg,

 

Thanks for this beautiful work!

 

Cheers,

 

Jose




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