Electronic Telegram No. 5372
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
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Prepared using the Tamkin Foundation Computer Network


BETA-TUCANIDS METEOR SHOWER 2024
     P. Jenniskens, SETI Institute and NASA Ames Research Center, reports that
the episodic beta Tucanid meteors (IAU shower #108) returned this year on
Mar. 12 (cf. map at website URL http://cams.seti.org/FDL/ for dates of Mar. 12
and 13).  This meteor shower was first detected by CAMS Chile (S. Heathcote
and T. Abbott, NOIRLAB/Cerro Tololo; and E. Jehin, University of Liege) on
Mar. 12 at 4h UTC (N = 5 Beta Tucanid meteors), then peaked over CAMS New
Zealand (coordinated by J. Baggaley, University of Canterbury; and J. Scott,
University of Otago) starting at 8h UTC (N = 20), followed by CAMS Australia
(H. Devillepoix, Curtin University; and D. Rollinson) starting at 14h UTC (N =
6).  A late shower member was detected by CAMS New Zealand on Mar. 13 at 8h29m
UTC.  The networks in New Zealand (J. Scott) and Australia (D. Rollinson) also
participate in the Global Meteor Network, coordinated by D. Vida.  The shower
was previously detected in 2020, peaking at solar longitude = 352.38 +/- 0.09
deg with full-width-at-half-maximum = 0.76 deg, and in 2021, when the shower
peaked at 352.27 +/- 0.04 deg with FWHM = 0.59 deg -- but it was not present
obviously in 2022 and 2023.  In 2024, the shower peaked at solar longitude
352.03 +/- 0.03 deg with FWHM = 0.43 deg (standard errors).  Thirty-two
triangulated shower meteors radiated from geocentric radiant R.A. = 66.2 +/-
2.1 deg, Decl. = -78.2 +/- 0.6 deg (equionox J2000.0), with geocentric
velocity 30.8 +/- 0.7 km/s (with error indicating the 1-sigma dispersion),
corresponding to the following median orbital elements:  a = 2.83 +/- 0.45 AU,
q = 0.9810 +/- 0.0016 AU, e = 0.654 +/- 0.046, i = 51.8 +/- 0.7 deg, Peri. =
345.3 +/- 0.9 deg, and Node = 172.05 +/- 0.24 deg (equinox J2000.0).  The
parent body was identified (cf. Janches 2020, Ap.J. Lett. 895, L25) as minor
planet (248590) 2006 CS, a presumed now-dormant Jupiter-family comet.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2024 CBAT
2024 March 21                    (CBET 5372)              Daniel W. E. Green