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Old 14-06-2021, 11:14 PM
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Sunfish (Ray)
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Originally Posted by Atmos View Post
which equates to about 627 light years from us. .
So a long way closer than Tuc 47 and part of some other structure?
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  #22  
Old 16-06-2021, 12:15 PM
johnnyjetski (John)
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Something moving in 47 Tuc

Very interesting find Colin.
Looks like those 3 moving stars are in our foreground.
John
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Old 16-06-2021, 09:10 PM
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Atmos (Colin)
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Just as a side note for anyone who isn't sure, the last blink images that I posted are Hubble data, the field is tiny compared to what I've been able to capture, even on a tight crop.

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So a long way closer than Tuc 47 and part of some other structure?
I got my original field wrong, only by a tiny amount but I spotted the wrong moving star. I also may have misread the DR2 data for the parallax measurement but I'm not sure. It wouldn't be unusual to spot a small star (brown dwarf) between us and 47 Tuc as it is estimated that there is a bucket load of them out there... Yes, bucket load is a scientific amount!

As for having a parallax of 1.1 arc seconds, that would potentially make it within the Oort Cloud which I suppose could be a possibility considering it is Hubble tanking the images.
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Old 16-06-2021, 09:48 PM
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Beyond 47 Tuc?( not that I understand much of this)

https://iopscience.iop.org/article/1...38-4357/aae089
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Old 17-06-2021, 11:43 AM
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You're right - good find! Given that there are now three moving stars, would the same thing occur almost anywhere? Like could you expect to see the same thing in any part of the sky given a survey that goes deep enough and is repeated after a long enough interval?


Markus
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