[Iaude] CBET 5415: PSI-FORNACID METEORS 2024

[quai at eps.harvard.edu]

                                                  Electronic Telegram No. 5415
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau at eps.harvard.edu (alternate cbat at iau.org)
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Prepared using the Tamkin Foundation Computer Network


PSI-FORNACID METEORS 2024
     P. Jenniskens, SETI Institute and NASA Ames Research Center, reports the
detection of a newly recognized meteor shower with a radiant in Fornax on 2024
July 4, given the provisional name psi-Fornacids (cf. website URL
http://cams.seti.org/FDL/ for the date of 2024 July 4).  Twenty-eight meteors
were triangulated by CAMS New Zealand (coordinated by J. Baggaley, University
of Canterbury, and J. Scott, University of Otago), nine by CAMS Australia (H.
Devillepoix, Curtin University, and D. Rollinson), one by CAMS South Africa
(T. Cooper), and one by CAMS Chile (S. Heathcote, NOIRLAB/Cerro Tololo, and E.
Jehin, University of Liege).  The triangulated meteors had a magnitude range
of -2 to + 3; the shower was active from July 3 to 6 (corresponding to solar
longitude 101.9 to 105.3 deg, peaking at 102.9 deg, equinox J2000.0).  Meteors
radiated from geocentric coordinates R.A. = 44.3 +/- 2.4 deg, Decl. = -38.2
+/- 1.5 deg, with geocentric velocity 51.6 +/- 1.8 km/s (one-standard-
deviation dispersion).  The sun-centered ecliptic radiant is centered at
lambda = 281.4 +/- 0.4, beta = -51.8 +/- 0.2 deg (standard error).  Orbital
elements are those of a long-period comet meteoroid stream that grazes the
earth's orbit with the following median orbital elements (and standard
errors):  semi-major axis about 27.2 AU, q = 0.9923 +/- 0.0002 AU, e = 0.964
+/- 0.023, i = 92.8 +/- 0.3 deg, Peri. = 342.0 +/- 0.7 deg, and Node = 282.89
+/- 0.15 deg (equinox J2000.0).  This is an annual shower with the annual
number of orbits measured, starting in 2019:  6, 11, 11, 18, 11, 40.  A
possible parent body is the poorly observed comet C/1930 L1 (Forbes), with
parabolic orbital elements q = 1.153 AU, i = 97.09 deg, Peri. = 320.97 deg,
Node = 279.26 deg, and a theoretical shower radiant at R.A. = 44.1 deg, Decl.
= -31.8 deg, and geocentric velocity 51.7 km/s centered on solar longitude
99.8 deg (using the method P+ of Neslusan et al. 1998, A.Ap. 331, 411).


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                         (C) Copyright 2024 CBAT
2024 July 15                     (CBET 5415)              Daniel W. E. Green