Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Getting plate-solving status, please wait...

Crab Nebula (computed Expansion 1950 - 2100)

Technical card

Imaging telescope or lens:Selfmade 443/2048 Newtonian f4.6

Imaging camera:SBIG ST-10 XME

Mount:Sideres85

Guiding telescope or lens:Selfmade 443/2048 Newtonian f4.6

Guiding camera:SBIG ST-10 XME

Software:PixInsight

Filter:SBIG CFW-9

Accessories:SBIG AO-8Baader RCC-1 Coma Corrector

Resolution: 1920x1080

Integration: 0.0 hours

Astrometry.net job: 2645578

RA center: 83.636 degrees

DEC center: 22.016 degrees

Pixel scale: 0.343 arcsec/pixel

Orientation: 0.161 degrees

Field radius: 0.105 degrees

Data source: Own remote observatory

Description

Based on my images for Crab Nebula (one decade time-lapse movie), I've computed virtual images of the Crab Nebula for a timespan of 150 years.

A correlation algorithm programmed by myself has computed the movement of each single pixel (2073600) over time. For subpixel accuracy the correlation algorithm worked on enlarged images (50 MPixel each). For the error estimation the proper motions of 23 stars were measured from a computed virtual picture for the year 1950 and a real picture of the year 2011. Comparing these 23 proper motions with the Gaia DR2 data gives a mean positional error of only 0.009"/year, this compares to the width of a hair at a distance of 2 km.

The proper motions of so many stars over the period of 150 years are very impressive.
Even the pulsar is moving correctly to the right!

The visual comparison of a computed image for 1973 with a real archive image (taken by Bill Schoening at Kitt Peak National Observatory in 1973) shows good consistency regarding the positions of the stars and the red filaments.
The areas with the white synchrotron radiation are moving too fast and therefore are not rendered correctly. A few stars in these areas are spuriously influenced too.

The video Crab Nebula (computed Expansion 1950 - 2100) is based too on the 386 real images with a total integration time of 32 hours, recorded in the years 2008 - 2017.

Comments

Author

DetlefHartmann
DetlefHartmann
Like

Sky plot

Sky plot

Histogram

Crab Nebula (computed Expansion 1950 - 2100), 





    
        

            DetlefHartmann