On the Displacement of Meteor Showers Activity

Бабаджанов, П. Б.; Obrubov, Yu. V.

doi:10.1007/978-94-009-7846-1_104

Cited by 8 publications

(7 citation statements)

References 3 publications

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“…In some cases this leads to a variation of shower maximum activity date, in other cases there are no noticeable displacements of this date. As reported earlier (Babadzhanov and Obrubov 1982) there are two possible cases involved:…”

Section: Encounter Conditions Of Meteor Streams With the Earthmentioning

confidence: 86%

Some Features of Evolution of Meteor Streams

Бабаджанов

Obrubov

1983

Highlights astron.

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It is shown that a number of features of meteor showers such as the correlation of orbital semimajor axes and longitudes of the ascending nodes with meteor magnitudes, the restriction of visibility periods and the displacement of maximum activity dates is explained by the joint influence of planetary perturbations, the Poynting-Robertson effect and its corpuscular analogue, light pressure and ejection velocities of different mass meteoroids from cometary nuclei.

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Section: Encounter Conditions Of Meteor Streams With the Earthmentioning

confidence: 86%

Some Features of Evolution of Meteor Streams

Бабаджанов

Obrubov

1983

Highlights astron.

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“…It is in a 9/4 resonance with Jupiter, and their orbit evolution calculations show that its perihelion is steadily decreasing to a minimum of 0.03 AU in about the year 2450. 96P has also been suggested as the parent body for several meteor streams (Sekanina 1990a;McIntosh 1990;Babadzhanov & Obrubov 1993). All other references to 96P discuss its meteor stream connection (Jenniskens et al 1997;Williams & Collander-Brown 1998), and the possibility that some sunskirting comets are fragments of it that were thrust onto their current parabolic orbits after encounters with Jupiter (Ohtsuka, Nakano, & Yoshikawa 2003;Sekanina & Chodas 2005).…”

Section: Introductionmentioning

confidence: 99%

The Unusual Spectrum of Comet 96P/Machholz

Langland-Shula

Smith

2007

ApJ

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We report spectra from 3000-5900 A for comet 96P/Machholz, obtained on 2007 Apr 27 UT with the 3-m Shane telescope at Lick Observatory. The spectra are extremely carbon poor, and show a prominent NH_2 series, but no CN emission. NH, NH_2, and C_2 gas production rates are (8.36 +/- 2.18)x10^25, (29.88 +/- 3.66)x10^25, and (4.52 +/- 0.61)x10^23 molecules sec^-1, respectively, as determined from Haser model fits to the data. Upper limits to the gas production rates for CN and C_3 are 7.5x10^22 and 2.0x10^23, respectively. Though 96P is depleted in C_2 and C_3 relative to NH, it is even more depleted in CN than other so-called "carbon-chain depleted" comets.Comment: 14 pages, 4 tables, 2 figures, accepted for publication in ApJ

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“…However sometimes, the importance of the mean parameters is quite high. In Babadzhanov & Obrubov (1980, 1982), Williams, Murray & Hughes (1979), Murray, Hughes & Williams (1980) and Fox, Williams & Hughes (1982), the mean orbital elements have been used to investigate the long‐term evolution of meteor streams. Also, the mean orbit is compared with the orbit of the possible parent of the stream, as in Fox, Williams & Hughes (1984) and Lindblad (1990).…”

Section: Introductionmentioning

confidence: 99%

Calculation of the mean orbit of a meteoroid stream

Jopek¹,

Rudawska²,

Prętka-Ziomek³

2006

Monthly Notices of the Royal Astronomical Society

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The traditional approach used for averaging the parameters of a meteoroid gives results that are biased by several conceptual defects: among others things, the mean orbital elements do not satisfy the laws of celestial mechanics. The Voloshchuk & Kashcheev method in the domain of geocentric parameters removes all of these defects except one: the epoch corresponding to the mean geocentric values, which is critical for the calculation of the mean heliocentric orbital elements from the mean geocentric radiant coordinates and velocity. We propose a new approach: our solution gives the mean orbital elements and the geocentric radiant parameters of the meteor stream, free from all conceptual faults. Instead of the Keplerian orbital elements, we average the heliocentric vectorial elements, and the solution is obtained by the least‐squares method completed by placing two constraints on the mean vectorial elements. One may calculate the corresponding geocentric parameters using the theoretical radiant approach. However, to obtain mutually numerically consistent helioparameters and geoparameters, all members of the stream should be pre‐integrated into a common epoch of time. Our approach, due to simultaneous averaging of seven variables, is limited to the streams of seven or more members only. We give the results of the numerical example, which shows that the mean values obtained by our approach differ slightly from those obtained by the traditional averaging. However, for some streams and for some particular orbital elements, the differences can exceeds 2 au in the semimajor axes or in the angular orbital elements.

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On the Displacement of Meteor Showers Activity

Cited by 8 publications

References 3 publications

Some Features of Evolution of Meteor Streams

Some Features of Evolution of Meteor Streams

The Unusual Spectrum of Comet 96P/Machholz

Calculation of the mean orbit of a meteoroid stream

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