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    Re: Titanic's last stars
    From: Greg Rudzinski
    Date: 2012 Mar 16, 10:57 -0700

    The attached USNO data for 4/15/1912 UT 2230 has different Hc values than the epoch 2010 Pub 249 Hc values. I am surprised by the large Hc difference ( or has a mistake been made?)

    Greg Rudzinski

    NavList] Re: Titanic's last stars
    From: Greg Rudzinski
    Date: 16 Mar 2012 07:10
    Paul,

    Working in round numbers I get:

    Early twilight starting at UT 2230 4/15/1912 ZD +3 Lat. 42* N Lon. 47* 30' W (Sun Hc -8*)
    GHA Aries 181* 12'
    LHA Aries 134* for A.P. Lat 42* N Lon. 47* 12' W
    LHA Aries 133* for A.P. Lat 42* N Lon. 48* 12' W

    Pub 249 recommended selected stars for three body fix

    (LHA 134*)
    Kochab Hc 40* 25' Az 021*
    Regulus Hc 55* 59' Az 147*
    Aldebaran Hc 29* 32' Az 266*

    (LHA 133*)
    Kochab Hc 40* 09' Az 021*
    Regulus Hc 55* 34' Az 145*
    Aldebaran Hc 30* 16' Az 265*

    See pic 96 for Pub 249 (42*N)

    Greg Rudzinski
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