J/A+A/529/A107 Photometry of 4 main belt asteroids (Marciniak+, 2011)
Photometry and models of selected main-belt asteroids.
VIII. Low-pole asteroids.
Marciniak A., Michalowski T., Polinska M., Bartczak P., Hirsch R.,
Sobkowiak K., Kaminski K., Fagas M., Behrend R., Bernasconi L.,
Bosch J.-G., Brunetto L., Choisay F., Coloma J., Conjat M., Farroni G.,
Manzini F., Pallares H., Roy R., Kwiatkowski T., Kryszczynska A.,
Rudawska R., Starczewski S., Michalowski J., Ludick P.
<Astron. Astrophys. 529, A107 (2011)>
=2011A&A...529A.107M 2011A&A...529A.107M
ADC_Keywords: Minor planets ; Photometry
Keywords: techniques: photometric - minor planets: asteroids
Abstract:
The set of more than 100 asteroids, for which spin parameters have
been modelled using an amplitude, magnitude or epoch methods, showed a
pronounced gap in the distribution of the asteroid spin axes. These
spin axes are rarely aligned with the ecliptic plane.
The number of asteroids with known spin parameters should be increased
to allow for statistical investigations.
We gathered extensive photometric datasets on four selected main-belt
asteroids to model their spin and shape parameters using the
lightcurve inversion method. Our only criterion of selection was their
observability for small telescopes.
Description:
The files contain asteroid brightness and geometry for corresponding
epochs. These files were used for obtaining shape models and spin
states of the asteroids. Individual lightcurves within a file are
separated by an empty line, all lightcurves are relative.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
objects.dat 68 4 Asteroid fundamental parameters
94lcs.dat 111 843 Asteroid 94 Aurora individual lightcurves
174lcs.dat 111 1215 Asteroid 174 Phaedra individual lightcurves
679lcs.dat 111 1567 Asteroid 679 Pax individual lightcurves
714lcs.dat 111 1377 Asteroid 714 Ulula individual lightcurves
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See also:
J/A+A/465/331 : Asteroid brightness and geometry (Durech+, 2007)
J/A+A/498/313 : Photometry of 3 main belt asteroids (Marciniak+, 2009)
J/A+A/508/1503 : Photometry of 3 main belt asteroids (Marciniak+, 2009)
Byte-by-byte Description of file: objects.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ast Asteroid number
5- 13 A9 --- Name Asteroid name
15- 19 F5.2 mag H Absolute magnitude H parameter (1)
21- 25 F5.1 km Diam IRAS diameter (1)
27- 35 F9.6 deg i Inclination (1)
37- 46 F10.8 --- e Eccentricity (1)
48- 57 F10.8 AU a Semimajor axis (1)
59- 68 A10 --- FileName Name of the file containing the light curve
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Note (1): Data from The Asteroid Orbital Elements Database, Cat. B/astorb.
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Byte-by-byte Description of file: 174lcs.dat 679lcs.dat 714lcs.dat 94lcs.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d JD JD epoch corrected for the light-time
corresponding to the Earth-asteroid distance
16- 27 E12.6 --- br Relative brightness in intensity units,
mean brightness of each lightcurve is unity
29- 41 E13.6 AU Sx x component of the vector from the asteroid to
the Sun in J2000 ecliptic Cartesian coordinates
43- 55 E13.6 AU Sy y component of the vector from the asteroid to
the Sun in J2000 ecliptic Cartesian coordinates
57- 69 E13.6 AU Sz z component of the vector from the asteroid to
the Sun in J2000 ecliptic Cartesian coordinates
71- 83 E13.6 AU Ex x component of the vector from the asteroid to
the Earth in J2000 ecliptic Cartesian coordinates
85- 97 E13.6 AU Ey y component of the vector from the asteroid to
the Earth in J2000 ecliptic Cartesian coordinates
99-111 E13.6 AU Ez z component of the vector from the asteroid to
the Earth in J2000 ecliptic Cartesian coordinates
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Acknowledgements:
Anna Marciniak, aniab(at)lab.astro.amu.edu.pl
References:
Michalowski et al., Paper I 2004A&A...416..353M 2004A&A...416..353M
Michalowski et al., Paper II 2005A&A...443..329M 2005A&A...443..329M
Michalowski et al., Paper III 2006A&A...459..663M 2006A&A...459..663M
Marciniak et al., Paper IV 2007A&A...473..633M 2007A&A...473..633M
Marciniak et al., Paper V 2008A&A...478..559M 2008A&A...478..559M
Marciniak et al., Paper VI 2009A&A...498..313M 2009A&A...498..313M, Cat. J/A+A/498/313
Marciniak et al., Paper VII 2009A&A...508.1503M 2009A&A...508.1503M, Cat. J/A+A/508/1503
(End) Patricia Vannier [CDS] 01-Mar-2011