Publications (11)9.17 Total impact
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Article: Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution
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ABSTRACT: The larger number of models of asteroid shapes and their rotational states derived by the lightcurve inversion give us better insight into both the nature of individual objects and the whole asteroid population. With a larger statistical sample we can study the physical properties of asteroid populations, such as main-belt asteroids or individual asteroid families, in more detail. Shape models can also be used in combination with other types of observational data (IR, adaptive optics images, stellar occultations), e.g., to determine sizes and thermal properties. We use all available photometric data of asteroids to derive their physical models by the lightcurve inversion method and compare the observed pole latitude distributions of all asteroids with known convex shape models with the simulated pole latitude distributions. We used classical dense photometric lightcurves from several sources and sparse-in-time photometry from the U.S. Naval Observatory in Flagstaff, Catalina Sky Survey, and La Palma surveys (IAU codes 689, 703, 950) in the lightcurve inversion method to determine asteroid convex models and their rotational states. We also extended a simple dynamical model for the spin evolution of asteroids used in our previous paper. We present 119 new asteroid models derived from combined dense and sparse-in-time photometry. We discuss the reliability of asteroid shape models derived only from Catalina Sky Survey data (IAU code 703) and present 20 such models. By using different values for a scaling parameter cYORP (corresponds to the magnitude of the YORP momentum) in the dynamical model for the spin evolution and by comparing synthetics and observed pole-latitude distributions, we were able to constrain the typical values of the cYORP parameter as between 0.05 and 0.6.01/2013; -
Article: Photometry and models of selected main belt asteroids. III. 283 Emma, 665 Sabine, and 690 Wratislavia
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ABSTRACT: Photometric observations of 283 Emma (1998, 2000, 2001, 2004), 665 Sabine (1998, 1999, 2001, 2004, 2005), and 690 Wratislavia (1998, 2000, 2004, 2005-2006) carried out on 44 nights at two observatories are presented. Using all available lightcurves, the spin vectors, senses of rotation, and shape models for these three asteroids have been determined.Astronomy and Astrophysics 10/2006; 459:663-668. · 4.59 Impact Factor -
Article: Photometry and models of selected main belt asteroids. II. 173 Ino, 376 Geometria, and 451 Patientia
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ABSTRACT: Photometric observations for 173 Ino (1998, 1999, 2002), 376 Geometria (1996, 1997/98, 1999, 2000, 2004) and 451 Patientia (1998, 2002, 2003) carried out at six observatories are presented. Using all available lightcurves, the spin vectors, senses of rotation and shape models of these three asteroids were determined.Astronomy and Astrophysics 10/2005; 443:329-335. · 4.59 Impact Factor -
Article: Asteroids' spin axis distribution
http://dx.doi.org/10.1051/0004-6361/200913692. -
Article: Photometry and models of selected main belt asteroids
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ABSTRACT: We report photometric lightcurve observations of 184 Dejopeja (apparition years: 2000, 2002, 2005, 2006), 276 Adelheid (2000, 2001, 2004, 2005, 2006), and 556 Phyllis (1998, 2000, 2002, 2004, 2005, 2006) carried out on 48 nights at four observatories. Using all of the available lightcurves, the spin vectors, senses of rotation, and shape models of these three asteroids have been determined.http://dx.doi.org/10.1051/0004-6361:20077694. -
Article: Photometry and models of selected main belt asteroids
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ABSTRACT: Photometric observations for 173 Ino (1998, 1999, 2002), 376 Geometria (1996, 1997/98, 1999, 2000, 2004) and 451 Patientia (1998, 2002, 2003) carried out at six observatories are presented. Using all available lightcurves, the spin vectors, senses of rotation and shape models of these three asteroids were determined.http://dx.doi.org/10.1051/0004-6361:20053656. -
Article: Physical models of ten asteroids from an observers' collaboration network
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ABSTRACT: Aims.We present physical models of ten asteroids obtained by means of lightcurve inversion. A substantial part of the photometric data was observed by amateur astronomers. We emphasize the importance of a coordinated network of observers that will be of extreme importance for future all-sky asteroid photometric surveys.Methods.The lightcurve inversion method was used to derive spin states and shape models of the asteroids.Results.We derived spin states and shape model for ten new asteroids: (110) Lydia, (125) Liberatrix, (130) Elektra, (165) Loreley, (196) Philomela, (218) Bianca, (306) Unitas, (423) Diotima, (776) Berbericia, and (944) Hidalgo. This increases the number of asteroid models up to nearly one hundred.http://dx.doi.org/10.1051/0004-6361:20066347. -
Article: Photometry and models of selected main belt asteroids. VI. 160 Una, 747 Winchester, and 849 Ara
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ABSTRACT: We present a set of new photometric observations of three main belt asteroids: 160 Una, 747 Winchester, and 849 Ara. This, combined with the available data, allowed us to construct their physical models. The lightcurve inversion method was used to obtain their spins and shapes. We have resolved problems with the rotation period of 160 Una, and found it to be $11.033176 \pm 0.000011$ h, almost twice the value given in the literature.http://dx.doi.org/10.1051/0004-6361/200811078. -
Article: Photometry and models of selected main belt asteroids
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ABSTRACT: We present photometric observations of three asteroids: 73 Klytia, 377 Campania, and 378 Holmia, together with their spin and shape models. The models were constructed with the lightcurve inversion method, using all available lightcurves of these objects. In the case of Campania, the long persisting doubts about its rotational period have been resolved. Various authors state periods between $8.48$ and $16$ h, while the period we determined is $11.664401 \pm 0.000010$ h.http://dx.doi.org/10.1051/0004-6361:20078930. -
Article: Photometry and models of selected main belt asteroids
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ABSTRACT: Photometric observations of 283 Emma (1998, 2000, 2001, 2004), 665 Sabine (1998, 1999, 2001, 2004, 2005), and 690 Wratislavia (1998, 2000, 2004, 2005–2006) carried out on 44 nights at two observatories are presented. Using all available lightcurves, the spin vectors, senses of rotation, and shape models for these three asteroids have been determined.http://dx.doi.org/10.1051/0004-6361:20065877. -
Article: Eclipsing binary asteroid 90 Antiope
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ABSTRACT: CCD observations of the binary asteroid 90 Antiope were carried out at seven observatories (Borowiec, Kharkiv, Pic du Midi, Chateau Renard, Les Engarouines, Ottmarsheim, and Durtal) on 31 nights from December 2002 through April 2003. The results show two-component lightcurves with each showing the same period of $16.505 \pm 0.002$ h. The first component is associated with the rotation of the two non-spherical bodies of the system; the second one is due to eclipses/occultations in the binary system. The lightcurves suggest that Antiope is an 'almost synchronous system' with orbital period of $16.5051 \pm 0.0002$ h and a little shorter rotational one of $16.5047 \pm 0.0002$ h. The ecliptic coordinates of the pole of the orbit system are $\lambda_{n} = 17\degr \pm 5\degr$ and $\beta_{n} = 25\degr \pm 5\degr$. A possibility of the observation of the eclipsing events during two future oppositions (April 2004 and July 2005) has been predicted.http://dx.doi.org/10.1051/0004-6361:20040449.
