The Geminid meteor stream and asteroid 3200 Phaethon
نویسندگان
چکیده
منابع مشابه
Search for Activity in 3200 Phaethon
We present deep optical imaging of Geminid meteor stream parent 3200 Phaethon taken in search of low-level cometary activity (i.e., coma or dust trail). Although no unambiguous cometary behavior was observed, we find an upper limit on the object’s cometary mass-loss rate of Ṁlim 0:01 kg s . The corresponding active fraction (the fraction of the surface area that could consist of freely sublimat...
متن کاملRecurrent Perihelion Activity in (3200) Phaethon
We present a study of planet-crossing asteroid (3200) Phaethon at three successive perihelia in 2009, 2010, and 2012, using the NASA STEREO spacecraft. Phaethon is clearly detected in 2009 and 2012, but not in 2010. In both former years, Phaethon brightened unexpectedly by ∼1 mag at large phase angles, inconsistent with the ∼1 mag of steady fading expected from a discrete, macroscopic body over...
متن کاملAn upper limit on gas production from 3200 Phaethon
Asteroid 3200 Phaethon resembles a comet in some ways, including a highly-eccentric orbit (e∼ 0.89) and a strong associated meteor shower (the Geminids). Yet this object has never been observed to exhibit any cometary activity, i.e., gas production. We observed 3200 Phaethon with the Caltech Submillimeter Observatory on two occasions, once while it was near its closest approach to Earth as it n...
متن کاملAnalysis of the Geminid meteor stream, 1958–1997, from radar observations
Results of long-term radar observations of the Geminids in the period 1958–1997 are presented. Mean activity profiles along the Earth’s passage through the stream show a systematic change of the peak activity and the width of the stream depending on the distribution of echo durations across the stream. Faint particles are more concentrated in inner orbits while the large ones dominate in the ou...
متن کاملMeteor Stream Membership Criteria
Criteria for the membership of individual meteors in meteor streams are discussed from the point of view of their mathematical and also physical properties. Discussion is also devoted to the motivation. It is shown that standardly used criteria have unusual mathematical properties in the sense of a term “distance”, physical motivation and realization for the purpose of obtaining their final for...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1993
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/262.1.231