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29 Piscid Meteor Shower in 2019
Jenniskens, P.; Howell, A.; Johannink, C. et al.
2020In Central Bureau Electronic Telegrams, 4882, p. 1
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Abstract :
[en] P. Jenniskens, SETI Institute and NASA Ames Research Center, reports unusual meteor shower activity observed in mid-October 2019 from a low-inclination stream, with additional activity seen in mid-Nov. 2019. Also, six meteors from this stream were detected by CAMS California imagers in 2014. So far, the shower has not been detected in 2020. During 2019 Oct. 17-18 UT, a cluster of 26 meteors was detected with a radiant near 29 Psc by nearly all of the CAMS low-light video networks. The shower is now listed as number 1046 in the IAU Working List of Meteor Showers and is named the 29 Piscids. The meteors radiated from a median radiant with coordinates R.A. = 4.3 +/- 0.6 deg, Decl. = -2.7 +/- 0.5 deg (equinox J2000.0) and heliocentric velocity 15.2 +/- 1.3 km/s. Median orbital elements and observed dispersions (1 sigma) are those of a low-inclination Jupiter-family comet: q = 0.8166 +/- 0.0096 AU, semi-major axis about 2.83 AU, e = 0.709 +/- 0.069, i = 1.9 +/- 0.3 deg, Peri. = 55.3 +/- 0.8 deg, Node = 24.1 +/- 0.6 deg, and longitude of perihelion = 79.1 +/- 0.6 deg (equinox J20000.0). The combined activity period extended from solar longitude 202.3 to 205.0 degrees (equinox J2000.0) with a maximum on 204.0 +/- 0.1 deg (look to the right of the anti-helion source at website URL http://cams.seti.org/FDL/ for the dates of 2019 Oct. 17-18). <P />One month later, during 2019 Nov. 11-18 UT, another period of outburst activity was observed that appears to be associated with the same parent body, given the similar eccentricity and longitude of perihelion of the orbit, when 93 meteors were triangulated with median radiant R.A. = 6.8 +/- 1.1 deg, Decl. = -7.2 +/- 1.2 deg, and geocentric velocity 10.8 +/- 1.4 km/s. Activity stretched between solar longitude 228.3 and 234.9 deg and peaked at 231.4 deg (cf. the above website for the dates of 2019 Nov. 11-18). Median orbital elements are q = 0.943 +/- 0.007 AU, semi-major axis about 3.10 AU, e = 0.693 +/- 0.103, i = 2.7 +/- 0.4 deg, Peri. = 27.5 +/- 1.7 deg, Node = 51.3 +/- 1.6 deg, and longitude of perihelion = 78.9 +/- 0.9 deg. There is a distinct trend of q versus Node, and the November observations align with those from October approximately as q = 0.318 + 0.36519 * 10[log(Node)], for Node in the range 23-54 deg. <P />The following "Cameras for All-sky Meteor Surveillance" (CAMS) Networks (cf. Jenniskens 2011, Icarus 216, 1) contributed to the data above: CAMS California (coordinated by Jenniskens), CAMS Florida (A. Howell), CAMS BeNeLux (C. Johannink), CAMS New Zealand (J. Baggaley), Lowell Observatory CAMS (N. Moskovitz), UAE Astronomical Cameras Network (M. Odeh), CAMS South Africa (T. Cooper), CAMS Arkansas (L. Juneau), CAMS Australia (M. Towner), CAMS Chile (S. Heathcote and E. Jehin), and CAMS Namibia (T. Hanke).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Jenniskens, P.
Howell, A.
Johannink, C.
Baggaley, J.
Moskovitz, N.
Odeh, M.
Cooper, T.
Juneau, L.
Towner, M.
Heathcote, S.
Jehin, Emmanuel  ;  Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Hanke, T.
Language :
English
Title :
29 Piscid Meteor Shower in 2019
Publication date :
01 October 2020
Journal title :
Central Bureau Electronic Telegrams
Volume :
4882
Pages :
1
Peer reviewed :
Editorial reviewed
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since 24 November 2025

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