Where the heck is Ross 248?

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mikaellq
2011-10-03
2012-10-09
  • mikaellq
    mikaellq
    2011-10-03

    I don’t seem to be able to find the darn star.
    A bug? Holes in the star charts? The wrong name?

     
  • mikaellq
    mikaellq
    2011-10-04

    Thanks, but Sinbad lookup actually finds something, V* HH And, which seems to
    be nothing because there is no star there, why I believe something is wrong
    either in Stellarium or in the star catalogs. Is it actually a bug or is there
    something I’ve misunderstood?
    I’ve downloaded all the star catalogs so it should certainly be complete.

     
  • barrykgerdes
    barrykgerdes
    2011-10-04

    I don't quite understand the problem. I checked the wiki on Ross 248 as above
    and was directed to HH And. This star is in the stellarium catalogue as HH
    And.

    I slewed to it and of course by the time I had slewed far enough it had moved
    off screen. I did a second search with the clock off and there is definitely a
    star there that has the same j2000 coords and mag as listed in the wiki.
    However the screen does not appear to be locked to the selected position
    unless it is selected when it first becomes visible at a FOV < 1 degree

    Barry

     
  • mikaellq
    mikaellq
    2011-10-05

    The problem is that Stellarium is not complete, OR it has a bug.
    This is not too difficult to understand.
    Simbad finds a star I know in fact exists but Stellarium doesn’t show it with
    its name as it should.
    But now I know why, the star catalog is incomplete.

     
  • Alexander Wolf
    Alexander Wolf
    2011-10-05

    It problem NOT in Stellarium, it problem with catalogues - different
    catalogues contains different data and in Stellarium used are NOT all
    existing catalogues.

     
  • barrykgerdes
    barrykgerdes
    2011-10-05

    Sorry we cannot display any more information about that star. The catalogues
    used in Stellarium are the ones we are able to use under our licence. They are
    not necessarily perfect and we accept that. If there is any problem it is with
    the catalogue. It is certainly not a bug in Stellarium. If the information
    required is not in the catalogue it cannot be displayed. Stellarium already
    has over 1 gigabyte of stars in its catalogues but there are still hundreds of
    gigabytes of star catalogues available that we don't have access to.

    Barry

     
  • mikaellq
    mikaellq
    2011-10-05

    Do you know the reason for the restrictions? Commercial reasons perhaps?
    The scientific attitude is normally complete openness.

     
  • mikaellq
    mikaellq
    2011-10-05

    I went to SIMBAD Astronomical Database, searched for Ross 248 and it actually
    finds V* HH And as it should.
    There on the page am I greeted with lots of information about the star.
    This made me think that this is a pretty obvious improvement on Stellarium.

    If not in the downloaded star catalogs or those in the default package then
    ”simulate” it!
    Use the SIMBAD information and plot the darn star, with the right color of
    course.
    The same idea works on other objects too, like galaxies.

    Easy to do, if the developers are interested that is.

     
  • barrykgerdes
    barrykgerdes
    2011-10-05

    Hi Mikaeliq

    When I said Stellarium does not have access to I meant that no one has
    converted them to run in stellarium. As I said there are hundreds of gigabytes
    of star data in the various catalogues. May I suggest that you read the
    instructions on how to prepare a catalogue and convert some of them to a form
    that stellarium can read . We would be love to have better catalogues but no
    one has volunteered yet to do the preparations.

    Barry

     


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