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C/2011 L4 (PanSTARRS) from Hawaii

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  • Michael
    2013 Mar 10.21 UT: m1= -1.0:, Dia=2 , DC=8, Tail: 0.25 deg. in PA 100. 7x35 B. (Altitude 5 degrees, magnitude uncertain, comp stars were Canopus and Alpheratz,
    Message 1 of 6 , Mar 10, 2013
      2013 Mar 10.21 UT: m1= -1.0:, Dia=2', DC=8, Tail: 0.25 deg. in PA 100. 7x35 B. (Altitude 5 degrees, magnitude uncertain, comp stars were Canopus and Alpheratz, extinction estimated approximately).

      Mike Linnolt
      Ocean View, HI
    • chergen
      2013 Mar. 11.09 UT: m1 = 1.5:, DC=8, naked eye [First spotted in 10x50 binoculars, then seen with the naked eye at an elevation of ~4 degrees. Comet was
      Message 2 of 6 , Mar 10, 2013
        2013 Mar. 11.09 UT: m1 = 1.5:, DC=8, naked eye

        [First spotted in 10x50 binoculars, then seen with the naked eye at an elevation of ~4 degrees. Comet was stellar. In 10x50 and 30x125 binoculars a tail 0.3-0.4 degrees long was seen in PA 80 degrees. Magnitude estimate corrected for atmospheric extinction with the ICQ average table for a site at an elevation of 0.7 km.]

        ICQ format:

        IIIYYYYMnL YYYY MM DD.DD eM mm.m:r AAA.ATF/xxxx &dd.ddnDC &t.ttmANG ICQ XX*OBSxx
        2011L4 2013 03 11.09 $I 1.5:TK 0.0E 1 8 ICQ xx HER02
        2011L4 2013 03 11.09 5.0B 10 D7 0.4 80 ICQ xx HER02
        2011L4 2013 03 11.09 12.5B 30 D7 0.3 80 ICQ xx HER02
      • Juan José González Suárez
        C/2011 L4 (PANSTARRS): - 2013 Mar. 14.81 UT: m1= 1.8*, Dia.=2.5 , DC=7/, Tail: 0.3 deg. in PA 70 deg, 10x50B. [ Very low altitude: 6 deg; solar elongation: 16
        Message 3 of 6 , Mar 15, 2013
          C/2011 L4 (PANSTARRS):
          - 2013 Mar. 14.81 UT: m1= 1.8*, Dia.=2.5', DC=7/,
          Tail: 0.3 deg. in PA 70 deg, 10x50B.
          [ Very low altitude: 6 deg; solar elongation: 16 deg.
          End of nautical twilight. Magnitude estimate corrected
          for atmospheric extinction with ICQ winter table.
          Mountain location, clear sky.].

          ( Morriondo, alt. 1040 m, Leon, N. Spain ).

          --------------------------------------------
          ICQ Format:

          2011L4 2013 03 14.81 $M 1.8 TK 5.0B 10 2.5 7/ 0.3 70 ICQ
          XX GON05
          --------------------------------------------

          J. J. Gonzalez
        • Juan José González Suárez
          C/2011 L4 (PANSTARRS): - 2013 Mar. 17.81 UT: m1= 2.2*, Dia.=3 , DC=8/, Tail: 0.5 deg. in PA 55 deg, naked eye. [ In 25x100 binoculars: fanned tail spanning
          Message 4 of 6 , Mar 18, 2013
            C/2011 L4 (PANSTARRS):
            - 2013 Mar. 17.81 UT: m1= 2.2*, Dia.=3', DC=8/,
            Tail: 0.5 deg. in PA 55 deg, naked eye.
            [ In 25x100 binoculars: fanned tail spanning from
            45 deg. to 70 deg., 1.5-deg in PA 55 deg.
            Low altitude: 8 deg; solar elongation: 18 deg.
            End of nautical twilight. Magnitude estimate corrected
            for atmospheric extinction with ICQ winter table.
            Mountain location, very clear sky.].

            ( Camposagrado, alt. 1130 m, Leon, N. Spain )

            ----------------------------------------------------
            ICQ Format:

            2011L4 2013 03 17.81 $I 2.2 TK 0.0E 1 3 8/ 0.5 55 ICQ
            XX GON05
            ----------------------------------------------------


            J. J. Gonzalez
          • Juan José González Suárez
            C/2011 L4 (PANSTARRS): - 2013 Mar. 20.82 UT: m1= 2.7*, Dia.=3 , DC=8/, Tail: 0.5 deg. in PA 35 deg, naked eye. - 2013 Mar. 20.81 UT: m1= 3.1*, Dia.=2.5 , DC=8,
            Message 5 of 6 , Mar 23, 2013
              C/2011 L4 (PANSTARRS):
              - 2013 Mar. 20.82 UT: m1= 2.7*, Dia.=3', DC=8/,
              Tail: 0.5 deg. in PA 35 deg, naked eye.
              - 2013 Mar. 20.81 UT: m1= 3.1*, Dia.=2.5', DC=8,
              Tail: 0.7 deg. in PA 35 deg, 10x50B.
              [ In 25x100 binoculars: fanned tail spanning from 30 deg. to 80 deg.,
              1.7-deg in p.a. 35 deg. Low altitude: 10 deg; solar elongation: 21 deg.
              End of nautical twilight. Some moonlight interference.
              Magnitude estimate corrected for atmospheric extinction
              with ICQ winter table. Rural location, clear sky.].

              ( La Union de Campos, alt. 780 m, Valladolid, Spain ).

              -------------------------------------------------------
              ICQ Format:

              2011L4 2013 03 20.82 $I 2.7 TK 0.0E 1 3 8/ 0.5 35 ICQ
              XX GON05

              2011L4 2013 03 20.81 $M 3.1 TK 5.0B 10 2.5 8 0.7 35 ICQ
              XX GON05
              -------------------------------------------------------

              J. J. Gonzalez
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