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| Abstract |
| Joint lightcurve observations of 10 near-Earth asteroids from Modra and Ondřejov | A. Galád
P. Pravec
P. Kunirák
. Gajdo
L. Korno
J. Világi
| Comenius University, FMPI, Bratislava
Astronomical Institute, AS CR, Ondřejov
Astronomical Institute, AS CR, Ondřejov
Comenius University, FMPI, Bratislava
Comenius University, FMPI, Bratislava
Comenius University, FMPI, Bratislava
| | The effort in photometry of near-Earth asteroids (NEAs) at Modra Observatory has been enhanced following a recent collaboration with Ondřejov Observatory. It led to efficient joint observations of several targets. We present the first results of the work that includes rotation lightcurve data for 10 NEAs. We have derived following synodic periods and amplitudes of their composite lightcurves: (3553), 3.1944 h, 0.08 mag; (22753), 10.24 h, 0.11 mag; (31669), 5.807 h, 0.07 - 0.27 mag; (40267), 4.9568 h, 1.01-1.11 mag; (66146), 2.3774 h and 0.12 0.15 mag; (88188), 2.6906 h, 0.06 mag; 1999 XA143, 9.489 h, 0.49 mag; 2001 CB21, 3.302 h, 0.19 mag; 2004 LJ1, 2.7247 h, 0.17 - 0.59 mag; 2004 XO14, 8.417 h, 0.19 - 0.25 mag. While the derived periods are unique for most of the objects, those of (3553), (22753) and 2001 CB21 are somewhat less reliable with U=2. A few of the objects are in the range of high concentration of binaries with periods < 4 h; we checked all the U=3 data for deviations from strict periodicity but found no deviation that would indicate a possible presence of satellite in them. Absolute magnitudes in Cousins R band were derived for (3553), 16.05; (40267), 15.59; (88188), 16.04; 2004 XO14, 15.84; errors of the first three Hr estimates are 0.2 mag, but that of 2004 XO14 is <0.1 mag.
The work at Modra has been supported by the Slovak Grant Agency for Science VEGA, Grant 1/0204/03. The work at Ondřejov has been supported by the Grant Agency of the Czech Republic, Grant 205/05/0604.
| | Presenting author: | A. Galád |
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