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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz

IMPACT FACTOR 2018: 0.350

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Volume 27, Issue 1


Comets of the Marsden and Kracht groups

Olga V. Kalinicheva
Published Online: 2018-11-21 | DOI: https://doi.org/10.1515/astro-2018-0032


Perihelion distances of Marsden and Kracht group comets fall into the range 6RS < q < 12RS (the Meyer group comets also share the same perihelion interval). It is by several folds larger than the perihelion distance of the Kreutz group comets (q < 2RS). Average circulation period for comets of the Marsden group is P = 5.5 years and for the Kracht group is P =5.3 years. The Marsden and Kracht group comets share the same origin; as well as 96P (Machholz), object 196256 (2003 EH1), meteor showers the Daytime Arietids, Northern and Southern δ Aquariids, Quandrantids forming the Machholz interplanetary complex. This work offers computational movement simulation for comet-progenitor fragments. It is shown that the orbits of the representatives of the complex can be explained if the decay of the cometprogenitor for objects 96P and 196256 occurred ~9500 years ago. The following evolution direction has been demonstrated for the complex objects: progenitor comet - comet 96P - the Marsden group comets - the Kracht group comets - the Southern δ Aquariids. However, not all the complex objects will necessarily pass through every stage of the above as it can be preceded by the total disintegration of the object.

Keywords: comets orbits; sungrazers; comet 96P/Machholz; object 2003 EH1 (196256)


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About the article

Received: 2018-03-01

Accepted: 2018-07-27

Published Online: 2018-11-21

Published in Print: 2018-11-01

Citation Information: Open Astronomy, Volume 27, Issue 1, Pages 303–309, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2018-0032.

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© by Olga V. Kalinicheva, published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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