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Thread: Acamar coordinates

  1. #1
    Join Date
    Jun 2009
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    Acamar coordinates

    Hi,

    Can someone please tell me the exact equatorial coordinates (RA and DEC.) of the Star Acamar for J2000? I'm finding several different values in declination in the order of 10 seconds or more...

    Kind regards,

    JKepler

  2. #2
    Join Date
    Sep 2006
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    1,860
    SIMBAD gives a position for epoch 2000 of RA = 02 58 15.696, Dec = -40 18 16.97.

    Be careful: this is a double star, with a slightly fainter companion about 8 arcsec to the East. It also has high proper motion, towards the WNW.

  3. #3
    Join Date
    Jun 2009
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    19
    Hi,

    Thanks for tip - I've checked. But is it corrected for parallax? Aberration? That's the problem, I think...

    Kind regards,

    JKepler

  4. #4
    Join Date
    Sep 2006
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    Parallax won't have any effect on the position at the level of 10 arcseconds. Aberration won't modify the position of Acamar relative to any nearby stars at the level of 10 arcseconds, either, though it might change the position of Acamar relative to very distant objects by that much.

    What are these other sources of information? Why would you not trust SIMBAD?

  5. #5
    Join Date
    Jun 2009
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    19
    Sorry for the late reply.

    I trust in SIMBAD, of course. But programs like the award winning REDSHIFT 4 give 5 arcseconds more. Others more.
    Something's not right here...

    JKepler

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