PREDNASAJUCI / LECTURER :

Oleksandra Ivanova

(1) Astronomical Institute, Slovak Academy of Sciences,
059 60 Tatranská Lomnica

NAZOV / TITLE :

Activity of distant comet C/2014 N3 (NEOWISE) beyond the snow line

ABSTRAKT / ABSTRACT :

Understanding the mechanisms driving cometary activity, particularly the factors that trigger it is of
fundamental importance for the cosmogony of the Solar System. The study of activity in such faint objects
as distant comets is a new and one of the most priority directions of modern science regarding active small
bodies of the Solar System. This work presents the results of a photometric and spectroscopic analysis of
long-period comet C/2014 N3 (NEOWISE) at a heliocentric distance of 4.51 au, obtained as part of a program
investigating cometary activity at large heliocentric distances using quasi-simultaneous observations.
Visible-range data were obtained on the 6-m BTA telescope, while infrared measurements were obtained from
the NEOWISE space telescope. No significant gas emissions were detected in the optical spectra. The analysis
of the dust component includes measurements of color properties, dust level activity, and an assessment of
dust emission dynamics. Monte Carlo modeling was used to estimate the total dust mass loss and ejection
velocities of particles. NEOWISE data were used to analyze CO₂ production rates before and after perihelion.