Reposting because it claims I can't edit my post after 30 minutes, when did that start ?
Been on travel so just now catching up.
Nice, this is exactly the line of thought I've been following the last couple of weeks. In addition for many years (only recently disproven as not possible) folks believed that the star that presaged Charles II's birth was CAS A. Charles II was known as the "Restoration" King, which is suspiciously like reclamation and retriibution to named things in the book. It's now viewed as not possible because they've dated the explosion as no earlier than 1670 and Charles was born in 1630.
The coordinates you guys came up with are close to the ones I did. It's exact location depends on a few factors.
- The value used for proper motion. It should be possible to see whether FDEV even factors this in and if they do how. Given CAS A's perceived proper motion then 1300 years should amount to a few milli-arcseconds/year times 1300 which gives a few arc seconds. That will be (top of head guess) many ones or few 10s of LYs
- The distance. This is the real kicker. If they just googled it they come up with a number like 11,000 which is a nice round number and at the high end. The literature lists it from 8K to 11K LY. There's no good way to precisely guage distance that far out. The VLBA could do it but I'm not aware that anyone has tried. Nothing else has the parallax capability. That leaves a search tube 1's to 10s of light years across and a few thousand light years long. A daunting task but probably simplified since I'm sure they just lifted values from some catalog..
- The actual object (shown in 2010 to be a neutron star) is still there but the precise location is a bit fuzzy. There's frequently a 'kick' during explosion due to asymmetries in material densities that eject the object from the expanding sphere of material. To date (from my reading) Cas A does appear to be in the center.
I'm kind of skeptical that they factored all that in a meaningful way since it's not precisely known so again, standard catalog data guess are best guesses.
By 3302 the dust remnants will be pretty diffuse and mostly gone leaving some neutron star or black hole.
One other interesting tidbit. There was a historic belief that Cas A cycled every 300 years or so. There were historic observations reporting a bright object in it's general location but follow ups never saw anything. In the 1800s one school of thought was that it was the star of Bethlehem. I believe that's all been pretty thoroughly debunked since there's no modern mechanism for that behavior but prior to the last century nobody really knew better and the idea still echoes around in various non-scientific literature.
So if it's in game there should be a neutron star in that area. One possibility is that it doesn't show up in the star maps and you have to 'discover' it through some other mechanism. It's not that hard to make another star type of 'undiscovered' similar to the carbon, proto, y-type, o-type flags so they don't show up in the galmap under normal circumstances. These objects would only show up if you somehow discovered their location. Whether that was done is a different story but it's pretty trivially done and lends itself to some form of 'quest mode'.
