Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-18T15:46:19.972Z Has data issue: false hasContentIssue false
  • English
  • Français

The IMPACTON Project: Pole and Shape of Eight Near-Earth Asteroids†

Published online by Cambridge University Press:  01 March 2016

José Sergio Silva ,
Daniela Lazzaro ,
Teresinha Rodrigues ,
Jorge Márcio Carvano ,
Fernando Roig ,
Roberto Souza  and
the IMPACTON team
José Sergio Silva
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
Daniela Lazzaro
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
Teresinha Rodrigues
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
Jorge Márcio Carvano
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
Fernando Roig
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
Roberto Souza
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
the IMPACTON team
Affiliation:
Observatório Nacional, COAA, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil email: [email protected], [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The formation and evolution of Solar System small bodies, in particular those in near-Earth orbits, is a complex problem which solution strongly depends on a better knowledge of their physical properties. To contribute to the international efforts in this direction the IMPACTON project (www.on.br/IMPACTON) set up a dedicated facility denominated Observatório Astronômico do Sertão de Itaparica (OASI). Using the 1-m telescope several dozens of NEAs were observed between March 2012 and October 2014. Here we will present the results obtained for 8 objects. Relative magnitudes were used to obtain lightcurves and derive rotational periods. Applying the inversion method developed by Kaasalainen and Torppa (2001) and Kaasalainen et al. (2001), along with lightcurves from literature, allowed to refine the rotational period of these asteroids as well as to derive their pole direction and shape. The obtained results confirm a lack of poles toward the ecliptic and with a majority of retrograde rotators. A more representative sample, however, is needed in order to drive robust conclusions.

Keywords

Minor planetsasteroids: general - techniques: photometry - methods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 181 - 184
Copyright
Copyright © International Astronomical Union 2016 

Footnotes

†

Based on observations obtained at the Observatório Astronômico do Sertão de Itaparica - OASI, Itacuruba, Brazil

References

Durech, J., Sidorin, V., & Kaasalainen 2011, A&A, 513, A46Google Scholar
Hanus, J., Durech, J., Broz, M., Warner, B. D., Pilcher, F., Stephens, R., Oey, J., Bernasconi, L., Casulli, S., Behrend, R., Polishook, D., Henych, T., Lehký, M., Yoshida, F., & Ito, T 2011 A&A, 530, A134Google Scholar
Harris, A. W., Young, J. W., Bowell, E., Martin, L. J., Millis, R. L., Poutanen, M., Scaltriti, F., Zappala, V., Schober, H. J., Debehogne, H., & Zeigler, K. W. 1989 Icarus, 77, 171Google Scholar
Jahn, J and Kretlow, M. 2014 Minor Planet Bulletin, 41, 67Google Scholar
Kaasalainen, M. & Torpa, J. 2001 Icarus, 153, 24Google Scholar
Kaasalainen, M., Torppa, J., & Muinonen, K. 2001 Icarus, 153, 37Google Scholar
LaSpina, A. Spina, A., Paolicchi, P., Kryszczyska, A., & Pravec, P. 2004 Nature, 428, 400Google Scholar
Silva, J. S. 2015 PhD Thesis, Publicacões do Observatório Nacional, Rio de JaneiroGoogle Scholar
Warner, B. D. 2014a Minor Planet Bulletin, 41, 41Google Scholar
Warner, B. D. 2014b Minor Planet Bulletin, 41, 113Google Scholar
Warner, B. D. 2014c Minor Planet Bulletin, 41, 157Google Scholar
Warner, B. D. 2014d Minor Planet Bulletin, 41, 213Google Scholar
Warner, B. D. 2015 Minor Planet Bulletin, 42, 115Google Scholar