Optical Imaging of the Radiant Points of Leonids during the 2001 Storm with the 105cm Kiso Schmidt Telescope

Details Optical Imaging of the Radiant Points of Leonids during the 2001 Storm with the 105cm Kiso Schmidt Telescope Optical Imaging of the Radiant Points of Leonids during the 2001 Storm with the 105cm Kiso Schmidt Telescope

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pasj...54l..83n&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.54, No.6, pp.L83-L88

Astronomy and Astrophysics

Astronomy

1

Comets: Individual (Comet 55P/Tempel-Tuttle), Meteors, Meteoroids

Scientific paper

We report on the results of CCD imaging of the radiant points of Leonids with the 105 cm Kiso Schmidt telescope during its storm in 2001. The center coordinates of the observed field were α(J2000.0) = 10h17m02.s4 and α(J2000.0) = +21°37'48."0, corresponding to the center position between the two radiant points originating from dust trails created by the 1699 and 1866 returns of the Comet 55P/Tempel-Tuttle (McNaught, Asher 2001; WGN, 29, 156). Six CCD images having a field of view of 51.'2 × 51.'2 were obtained successively from 16h 58m to 18h 28m on November 18 (UT) in order to cover the two expected peaks of activity of the distinct radiant points. A limiting surface brightness of 25.93 mag arcsec-2, i.e., the 1 σ noise level of the sky background, was achieved in each image. As a result, we detected only one faint Leonid meteor which most likely originated from a dust trail created by the 1866 return . The integrated total magnitude of the meteor is mv = 18.34 ± 0.34 mag on the image. Assuming a duration time of 0.1-1s, we estimate the magnitude at the maximum luminosity of this meteor to be 9.70 ± 1.59 mag. This corresponds to a photometric mass of (2.65+13.5-2.22) × 10-10 kg, which makes this meteor one of the faintest and smallest Leonids detected so far.

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