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Registration Number

0219U000499, 0113U006608 , R & D reports

Title

The physical characteristics of small bodies of the Solar system studied in the optical region of the spectrum

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Head

Korsun Pavlo P.,

Registration Date

01-02-2019

Organization

Main Astronomical Observatory

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The project was fulfilled on the basis of the observational data obtained mostly by the authors of the project themselves. The original observations of the selected Solar System bodies belonging to the different dynamic groups and exhibiting comet-like activity in a wide range of heliocentric distances were obtained: 27 comets, whose orbital perihelia locate outside the water ice sublimation zone (distant comets); 6 comets moving at distances close to the Sun; around 20 active asteroids of the main asteroid belt. A long-term spectral and photometric monitoring of distant comet C/2006 W3 (Сhristensen) was carried out. The photometric monitoring of active Centaur 174P/Echeclus was continued. Statistical difference in the colors of dynamically new comets was found based on the analysis of the photometric data obtained for 14 long-period comets, which belong to the different dynamic groups but have orbital perihelia at large heliocentric distances. Polarimetric observations of five distant comets indicate that the phase polarization curve for these comets has, on average, a much deeper minimum than the synthetic phase curve obtained for comets at close distances from the Sun. This may be explained by the fact that the physical characteristics of particles inhabiting the comae of distant comets are different from the properties of cometary dust at distances close to the Sun. A theoretical simulation of the 174P/Echeclus' dust coma was made under the assumption that the axis of rotation of the nucleus has a significant inclination relative to the normal to the plane of its orbit (about 70 ° towards the Sun). The observed distribution of the surface brightness can be explained by short activity events at three regions on the surface of the Centaur. The absence of correlation between flares on the Sun and explosive activity of Main belt comets is shown, indicating that flares on the Sun are not the main cause of the activity of Main belt comets.

Product Description

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В.К.Розенбуш
Корсун П. П.
Кулик І. В.
М.М. Кисельов
О.В.Іванова
О.С.Шубіна
С.А.Борисенко
С.В.Зайцев
С.В.Харчук

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2020-04-02