Visualization of star movement in the NGC 7331 Group area (Deer Lick Group)
I did see this idea somewhere else, so of course I had to try this ... and it works great
For us stars look like static objects but in fact they are moving. Giving a long enough time period, that movement can be visualized.
This GIF animation below shows stars moving. I overlayed my capture (8" Meade ACF SCT) of the NGC 7331 group (Deer Lick Group) from September 2020 on a capture (48" Oschin Schmidt) of the Polamar Telescope from August 1953.
So there is 67 years difference and it shows at least 50 stars moving in that time frame in a 30 x 23 arcmin area.
I also made an image with the stars that move indicated. There are probably more but the overlay of the 2 captures is not perfect: differences in sky quality, equipment, and so on are causing a small random shift. But the indicated stars are 100% moving, anything else is not certain.
The Palomar capture is acquired from https://archive.stsci.edu/cgi-bin/dss_form
My capture:
Bortle 7/8
Meade LX65 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Baader Neodymium SkyGlow filter
Zwo ASI294MC Pro camera
Captured with SharpCap Pro
45 x 60 sec + 70 x 120 sec / @ -20 degrees Celsius / Gain 120 / Offset 4 / White balance R50/B50
Stacked in DeepSkyStacker
Processed in SiriL and Photoshop
Siril: Histogram and Color Calibration
Photoshop: black/white conversion, Levels, Curves.
Positioning of the Palomar capture over my capture
Animated GIF made with Microsoft GIFAnimator
Visualization of star movement in the NGC 7331 Group area
Forum rules
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
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Re: Visualization of star movement in the NGC 7331 Group area
Very clever and great animation. Terrific demonstration. Thanks for sharing.
Bruce
Bruce
Re: Visualization of star movement in the NGC 7331 Group area
Thanks Bruce!
This kind of stuff is so cool to do
Menno
This kind of stuff is so cool to do
Menno
Re: Visualization of star movement in the NGC 7331 Group area
Very interesting Menno.
Dave
Dave
Re: Visualization of star movement in the NGC 7331 Group area
Excellent work, Menno!
If you are interested here is a list of High Proper Motion stars:
https://www.cosmos.esa.int/web/hipparco ... per-motion
At the top of the list is Barnard's Star at a rate of 10.3 arc-seconds per year
https://www.cosmos.esa.int/web/hipparco ... tion-stars
https://en.wikipedia.org/wiki/Barnard's_Star
Barnard's Star is in northeast Ophiuchus so you need to hurry to get a baseline image to compare with next year.
I've attached a star chart and visibility plot. For my latitude (New York City area) it is at 40 degrees altitude at the beginning of astronomical darkness.
Brian
If you are interested here is a list of High Proper Motion stars:
https://www.cosmos.esa.int/web/hipparco ... per-motion
At the top of the list is Barnard's Star at a rate of 10.3 arc-seconds per year
https://www.cosmos.esa.int/web/hipparco ... tion-stars
https://en.wikipedia.org/wiki/Barnard's_Star
Barnard's Star is in northeast Ophiuchus so you need to hurry to get a baseline image to compare with next year.
I've attached a star chart and visibility plot. For my latitude (New York City area) it is at 40 degrees altitude at the beginning of astronomical darkness.
Brian
Re: Visualization of star movement in the NGC 7331 Group area
Thanx for the links and heads up Brian!
Not really interested (yet) but of course gonna read it. Knowledge is power (kinda)
For me Barnard's Star is now kinda low but I'll keep it mind.
Menno
Not really interested (yet) but of course gonna read it. Knowledge is power (kinda)
For me Barnard's Star is now kinda low but I'll keep it mind.
Menno