An interesting(?) thought has just occurred to me, prompted by the discussion in another thread: hip-13044-actual-coordinates.609724/.
We know that FD used a vizier catalogue to position most of the HIP stars in the ED galaxy. The missing ones (ie. not found) are almost all of those with a very small parallax values in that catalogue. Also, all the unreachable stars have quite small parallax values as well. The discussion in the other thread revealed that some parallax values in the vizier catalogue are subject to substantial errors. This was assuming that the Gaia catalogue, being more up to data had the latest, more accurate data.
I have recently looked a bit deeper into the Gaia catalogue for some other unreachable HIP stars and found that the parallax values, and therefore distances from Sol, are orders of magnitude different from what is in the game. In most cases those HIP stars should be much closer to Sol than they are in the game.
This is only a preliminary look at this question, and I intend at some point to download all the parallax values for the HIP stars from Gaia and calculate their real positions in the galmap. This is actually quite feasible, the Gaia website has an excellent query facility.
The big question is then, having these much more accurate positions for HIP stars, could FD then rerun the stellar forge for HIP stars and change all their coordinates to the more correct values ?
I know this is unlikely, but would be nice !
edit: Could do this for other catalogue stars as well, eg JMASS and HD stars, though they be be more accurate already.
We know that FD used a vizier catalogue to position most of the HIP stars in the ED galaxy. The missing ones (ie. not found) are almost all of those with a very small parallax values in that catalogue. Also, all the unreachable stars have quite small parallax values as well. The discussion in the other thread revealed that some parallax values in the vizier catalogue are subject to substantial errors. This was assuming that the Gaia catalogue, being more up to data had the latest, more accurate data.
I have recently looked a bit deeper into the Gaia catalogue for some other unreachable HIP stars and found that the parallax values, and therefore distances from Sol, are orders of magnitude different from what is in the game. In most cases those HIP stars should be much closer to Sol than they are in the game.
This is only a preliminary look at this question, and I intend at some point to download all the parallax values for the HIP stars from Gaia and calculate their real positions in the galmap. This is actually quite feasible, the Gaia website has an excellent query facility.
The big question is then, having these much more accurate positions for HIP stars, could FD then rerun the stellar forge for HIP stars and change all their coordinates to the more correct values ?
I know this is unlikely, but would be nice !
edit: Could do this for other catalogue stars as well, eg JMASS and HD stars, though they be be more accurate already.
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