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%:
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.
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