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Re: C/2008 C1(Chen-Gao) brightness

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  • jinzhao_318
    Dear Maik: Last night there are really many mistakes in our reports, However, I have measured our images right now using astrometry software. Below are
    Message 1 of 31 , Feb 3, 2008
      Dear Maik:
      Last night there are really many mistakes in our reports,
      However, I have measured our images right now using astrometry
      software.
      Below are observations, it seems the brightness is all right now,
      But I'm not really sure about the m1 and m2, especially the m1 when
      comets became diffuse.

      CK08C010 C2008 01 30.58240 22 51 06.89 +62 15 22.0 15.4
      N C42 M1=12.8 Del=0.9' Dc=5
      CK08C010 C2008 01 31.59073 22 57 05.01 +62 14 39.3 15.7
      N C42 M1=12.4 Del=0.6' Dc=6
      CK08C010 C2008 02 01.66713 23 03 33.84 +62 13 07.1 16.0
      N C42 M1=13.6 Del=0.7' Dc=3
      CK08C010 C2008 02 02.64737 23 09 33.45 +62 11 19.2 16.6
      N C42 M1=13.8 Del=0.75'Dc=1
      CK08C010 C2008 02 02.65466 23 09 35.36 +62 11 16.0 16.5
      N C42 M1=13.6 Del=0.8' Dc=2
      CK08C010 C2008 02 02.66146 23 09 38.38 +62 11 00.4 16.4
      N C42 M1=13.5 Del=0.8' Dc=1
      CK08C010 C2008 02 02.66891 23 09 41.83 +62 11 04.7 16.4
      N C42 M1=13.5 Del=0.9' Dc=1

      C42 Xingming Observatory, Mt. Nanshan. Observer X. Gao. Measurer
      J.Beize. 0.07-m refractor+CCD.

      Best Regards
      Jin Beize

      --- In comets-ml@yahoogroups.com, "Maik Meyer" <maik@...> wrote:
      >
      > Hi Alan, and all,
      >
      > > I managed to get the comet visually tonight. m1=13.1, 0.8' coma,
      diffuse.
      > > Fairly easy to see (once it had cleared a field star). I'll post
      more
      > > details once I issue the "Countdown" announcement in a few days.
      >
      > I wonder whether the brightness increase reported by the
      discoverers from Jan. 30 -
      > Feb. 2 is real, and we might see a brighter maximum in March than
      the expected 11-
      > 12 mag.
      >
      > Congrats to the first amateur discovery in 2008, and the first for
      the current
      > Edgar Wilson Award year (June 07 - June 08).
      >
      > Cheers, Maik
      > --
      > If they give you ruled paper, write the other way. * Juan Ramon
      Jimenez
      >
      ______________________________________________________________________
      __
      > maik@... http://www.comethunter.de
      > International Comet Quarterly http://cfa-
      www.harvard.edu/icq/icq.html
      > http://groups.yahoo.com/group/comets-ml
      >
    • jinzhao_318
      Dear Maik: Last night there are really many mistakes in our reports, However, I have measured our images right now using astrometry software. Below are
      Message 31 of 31 , Feb 3, 2008
        Dear Maik:
        Last night there are really many mistakes in our reports,
        However, I have measured our images right now using astrometry
        software.
        Below are observations, it seems the brightness is all right now,
        But I'm not really sure about the m1 and m2, especially the m1 when
        comets became diffuse.

        CK08C010 C2008 01 30.58240 22 51 06.89 +62 15 22.0 15.4
        N C42 M1=12.8 Del=0.9' Dc=5
        CK08C010 C2008 01 31.59073 22 57 05.01 +62 14 39.3 15.7
        N C42 M1=12.4 Del=0.6' Dc=6
        CK08C010 C2008 02 01.66713 23 03 33.84 +62 13 07.1 16.0
        N C42 M1=13.6 Del=0.7' Dc=3
        CK08C010 C2008 02 02.64737 23 09 33.45 +62 11 19.2 16.6
        N C42 M1=13.8 Del=0.75'Dc=1
        CK08C010 C2008 02 02.65466 23 09 35.36 +62 11 16.0 16.5
        N C42 M1=13.6 Del=0.8' Dc=2
        CK08C010 C2008 02 02.66146 23 09 38.38 +62 11 00.4 16.4
        N C42 M1=13.5 Del=0.8' Dc=1
        CK08C010 C2008 02 02.66891 23 09 41.83 +62 11 04.7 16.4
        N C42 M1=13.5 Del=0.9' Dc=1

        C42 Xingming Observatory, Mt. Nanshan. Observer X. Gao. Measurer
        J.Beize. 0.07-m refractor+CCD.

        Best Regards
        Jin Beize

        --- In comets-ml@yahoogroups.com, "Maik Meyer" <maik@...> wrote:
        >
        > Hi Alan, and all,
        >
        > > I managed to get the comet visually tonight. m1=13.1, 0.8' coma,
        diffuse.
        > > Fairly easy to see (once it had cleared a field star). I'll post
        more
        > > details once I issue the "Countdown" announcement in a few days.
        >
        > I wonder whether the brightness increase reported by the
        discoverers from Jan. 30 -
        > Feb. 2 is real, and we might see a brighter maximum in March than
        the expected 11-
        > 12 mag.
        >
        > Congrats to the first amateur discovery in 2008, and the first for
        the current
        > Edgar Wilson Award year (June 07 - June 08).
        >
        > Cheers, Maik
        > --
        > If they give you ruled paper, write the other way. * Juan Ramon
        Jimenez
        >
        ______________________________________________________________________
        __
        > maik@... http://www.comethunter.de
        > International Comet Quarterly http://cfa-
        www.harvard.edu/icq/icq.html
        > http://groups.yahoo.com/group/comets-ml
        >
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