7204 Ondřejov

7204 Ondřejov
Discovery [1]
Discovered by P. Pravec
Discovery site Ondřejov Obs.
Discovery date 3 April 1995
Designations
MPC designation 7204 Ondřejov
Named after
 Ondřejov
(town and observatory)[2]
1995 GH · 1980 WM3
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 35.26 yr (12,877 days)
Aphelion 2.9907 AU
Perihelion 2.3446 AU
2.6676 AU
Eccentricity 0.1210
4.36 yr (1,591 days)
33.190°
0° 13m 34.32s / day
Inclination 4.8612°
172.34°
235.18°
Physical characteristics
Dimensions 5.685±0.163 km[4]
6.25 km (calculated)[3]
5.2334±0.0101 h[5]
0.1810±0.0088[4]
0.10 (assumed)[3]
S [3]
13.8[1]
14.14[3]
13.7[4]
13.687±0.005 (R)[5]
13.67±0.19[6]

    7204 Ondřejov, provisional designation 1995 GH, is a stony asteroid from the middle region of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 3 April 1995, by Czech astronomer Petr Pravec at Ondřejov Observatory near Prague, Czech Republic.[7] It was the observatory's first numbered minor planet discovery.[2]

    The S-type asteroid orbits the Sun at a distance of 2.3–3.0 AU once every 4 years and 4 months (1,591 days). Its orbit has an eccentricity of 0.12 and an inclination of 5° with respect to the ecliptic.[1]

    A rotational light-curve was obtained based on a photometric observations at the U.S. Palomar Transient Factory, California, in December 2011. It showed a rotation period of 5.2334±0.0101 hours with a brightness amplitude of 0.55 in magnitude (U=2).[5]

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 5.9 kilometers in diameter and its surface has an albedo of 0.18,[4] while the Collaborative Asteroid Lightcurve Link (CALL) assumes a lower albedo of 0.10 and calculates a diameter of 6.3 kilometers.[3]

    The minor planet was named for both, the Czech village of Ondřejov, and its discovering Ondřejov Observatory, founded in 1898. It is the Czech Republic's oldest astronomical observatory still in use. In 1953, the observatory was integrated into the Astronomical Institute and is now also owned by the Academy of Sciences of the Czech Republic. Ondřejov is located about 35 kilometers southeast of the country's capital, Prague.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 7204 Ondrejov (1995 GH)" (2016-03-02 last obs.). Jet Propulsion Laboratory. Retrieved April 2016.
    2. 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (7204) Ondřejov. Springer Berlin Heidelberg. p. 583. ISBN 978-3-540-00238-3. Retrieved April 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (7204) Ondrejov". Asteroid Lightcurve Database (LCDB). Retrieved April 2016.
    4. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved April 2016.
    5. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved April 2016.
    6. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved April 2016.
    7. ↑ "7204 Ondrejov (1995 GH)". Minor Planet Center. Retrieved April 2016.

    External links


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