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(meteorobs) IMO Shower Circ.: Leonids 2003

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  • RainerArlt
    . ... I M O S h o w e r C i r c u l a r ... LEONIDS 2003, VISUAL The 2003 Leonid meteor shower has not yet provided distinct peaks of activity. A full week
    Message 1 of 1 , Nov 20 1:10 AM
      .


      -------------------------------------
      I M O S h o w e r C i r c u l a r
      -------------------------------------

      LEONIDS 2003, VISUAL


      The 2003 Leonid meteor shower has not yet provided distinct
      peaks of activity. A full week of moderate Leonid meteor
      rates has shown only one clear maximum; near 2003 Nov 19.4 UT
      with an uncertainty of roughly +-6 hours.

      This maximum coincides with the predicted times of about
      06h30 - 08h00 UT for the encounter with the 15-revolution
      dust trail of parent comet 55P/Tempel-Tuttle. The dust
      was ejected from the comet near its perihelion passagein
      1533.

      The material ejected in 1499 has produced enhanced rates
      on November 13, but no clear peak time can be derived from
      the data received so far.

      The ZHR gives the number of meteors as if the radiant would
      be in the zenith, and at an observer's stellar limiting
      magnitude of +6.5. The latter condition implies strong
      extrapolations of observed meteor numbers, since the waning
      moon interfered with most of the observing periods.

      At this preliminary state, only the relative variations in
      the ZHR should be of interest. Absolute values must be
      discussed and fixed with the full dataset.

      --------------------------------------
      Date Solarlong nINT nLEO ZHR
      --------------------------------------
      Nov 12.80 229.93 1 0 (0)
      Nov 13.50 230.64 4 13 26
      Nov 13.72 230.86 7 12 21
      Nov 14.01 231.15 7 9 27
      Nov 14.77 231.92 1 2 (47)
      Nov 15.76 232.91 13 28 15
      Nov 16.24 233.40 1 4 (20)
      Nov 17.21 234.37 4 7 7
      Nov 18.52 235.69 6 18 13
      Nov 19.06 236.24 9 63 23
      Nov 19.14 236.32 10 51 39
      Nov 19.37 236.55 14 88 53
      Nov 19.90 237.09 14 35 39
      --------------------------------------

      A population index of r=2.3 was used to extrapolate to lm=+6.5.
      All solar longitudes refer to equinox J2000.0. nINT is the
      number of observing periods, nLEO the number of Leonid meteors.

      We would like to thank the following observers for their
      contributions to the above ZHR table:

      Alexandre Amorim, Joseph Assmus, Jure Atanackov, Aleksandar Atevik,
      Shushrut Bhanushali, Michael Boschat, Dustin Brown, Ed Cannon,
      Parag Deotare, Kshitija Deshpande, Lucio Furlanetto, Kearn Jones,
      Paul Jones, Javor Kac, Ashish Kuvelkar, Anna Levina, Michael Linnolt,
      Qiang Ma, Xiaoyun Ma, Paul Martsching, Mikhail Maslov, Alastair
      McBeath, Norman McLeod, Huan Meng, Yatin Patnekar, Nilesh Puntambekar,
      Tushar Purohit, Jurgen Rendtel, Rahul Sangole, Mikiya Sato, Tomoko
      Sato, Vladimir Slusarenko, Wesley Stone, Kazumi Terakubo, Richard
      Taibi, Michel Vandeputte, Jeremie Vaubaillon, Linjia Wang, Yi Wang,
      Guangjie Wu, Quanzhi Ye, Chao Zhang, Menglin Zhang, Zhousheng Zhang.


      Rainer Arlt, 2003 Nov 20, 09h UT

      --
      Rainer Arlt -- Astrophysikalisches Institut Potsdam -- www.aip.de
      Visual Commission - International Meteor Organization -- www.imo.net
      rarlt@... -- phone: +49-331-7499-354 -- fax: +49-331-7499-526




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