The 2005 October 5 outburst of October Camelopardalids

Details The 2005 October 5 outburst of October Camelopardalids The 2005 October 5 outburst of October Camelopardalids

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jimo...33..125j&link_type=abstract

WGN, Journal of the International Meteor Organization, vol. 33, no. 5, p. 125-128

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

Jarmo Moilanen (Finland) detected twelve meteors from a compact geocentric radiant at RA = 164.1 deg +- 2.0 deg, Dec. = +78.9 deg +-0.5 deg$, on the border of Draco and Camelopardalis, in the evening of 2005 October 5. The differential mass distribution index was a low s = 1.4+-0.2 (+0 to -6 magnitude). The new shower was confirmed by Esko Lyytinen (2 meteors, early period only, located at 25.00 deg E, +60.25 deg N) and Ilkka Yrjoelae (4 meteors: 26.4 deg E, +60.9 deg N) at nearby locations, and by Sirko Molau in Germany (7 meteors). Esko Lyytinen calculated an apparent speed of V_{g} = 47.3+-0.5 km/s from one two-station meteor, close to the parabolic limit. We conclude that the event was caused by the 1-revolution dust trail of a yet unidentified potentially Earth-threatening (Halley-type or) Intermediate Long-Period comet with orbital elements similar to those of the meteoroids: Epoch = 2005 October 5, a = infty (range 15 - infty) AU, q = 0.993+-0.001 AU, omega = 170.5+-1 deg, Omega = 192.59+-0.04 deg, and i = 78.53+-0.55 deg (J2000.0). % Z Anonymous, 1947, " Tähtitieteen Harrastajan Kirja", Rsan Julkaisuja III (URSA Publications III),
Suomalaisen Kirjallisuuden Seura Kirjapaino Oy (Association of Finnish literature printing house),
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