Physical and Dynamical Characterization of (5201) Ferraz-Mello, a Possible Extinct Jupiter Family Comet

Details Physical and Dynamical Characterization of (5201) Ferraz-Mello, a Possible Extinct Jupiter Family Comet Physical and Dynamical Characterization of (5201) Ferraz-Mello, a Possible Extinct Jupiter Family Comet

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2208c&link_type=abstract

American Astronomical Society, DPS meeting #40, #22.08; Bulletin of the American Astronomical Society, Vol. 40, p.427

Astronomy and Astrophysics

Astronomy

Scientific paper

The aim of this work is to put constraints on the possible origin of (5201) Ferraz-Mello by means of spectroscopic characterization and a study of the dynamics of this asteroid To this end we used the SOAR Optical Imager (SOI) to obtain observations of (5201)Ferraz-Mello in the g, r, i and z, in the SDSS filter system and compared to observations in the Sloan Moving objects catalog and to photometry of cometary nuclei,Centaurs and TNOs. The orbital evolution of (5201) Ferraz-Mello and of a sample of asteroids and comets that are close to that object in the a-e plane were simulated using a pure N-body code for 4,000 years forward and 4,000 years backward in time. The reflectance spectra obtainded from its colors in the SDSS system is unusual, with a steep spectral gradient that is comparable to TNOs and Centaurs, but with an increase in the reflectance in the g band that is not common in those populations. A similar behavior is seen in cometary nuclei that were observed in the presence of a faint dust coma. The dynamical results confirm the very chaotic evolution found previously and its dynamical similarity to the chaotic evolution of some comets. The asteroid is situated in the very stochastic layer existing at the border of the 2/1 resonance and has a very short Lyapunov time (30 - 40) years. Together the spectral characteristcs and the dynamical evolution suggest that (5201) Ferraz-Mello is a dormant or extinct comet.

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