1473 Ounas

1473 Ounas
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Observatory
Discovery date 22 October 1938
Designations
MPC designation 1473 Ounas
Named after
 Ounas river
(in Finland)[2]
1938 UT · 1950 NZ
1950 PB1
main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 76.58 yr (27,971 days)
Aphelion 3.1849 AU
Perihelion 1.9627 AU
2.5738 AU
Eccentricity 0.2374
4.13 yr (1,508 days)
236.59°
Inclination 13.649°
216.52°
129.44°
Physical characteristics
Dimensions 17.58 km
20.032±0.079 km[4]
17.62 km (derived)[3]
139.1 h[5][6]
0.1089
0.0841±0.0080[4]
0.1189 (derived)[3]
S [3]
11.7

    1473 Ounas, provisional designation 1938 UT, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, about 18 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland on 22 October 1938.[7]

    The S-type asteroid orbits the Sun at a distance of 2.0–3.2 AU once every 4.13 years (1,508 days). Its orbit shows an eccentricity of 0.24 and is tilted by 14 degrees to the plane of the ecliptic. It has a very long rotation period of 139.100 hours[5][6] and an albedo of 0.11.[4]

    The minor planet was named after the Ounas river, one of the principal rivers in Finland.[2]

    References

    1. 1 2 "JPL Small-Body Database Browser: 1473 Ounas (1938 UT)" (2015-07-13 last obs.). Jet Propulsion Laboratory. Retrieved November 2015.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1473) Ounas. Springer Berlin Heidelberg. p. 118. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 "LCDB Data for (1473) Ounas". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; 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 November 2015.
    5. 1 2 Pilcher, Frederick; Benishek, Vladimir; Ferrero, Andrea; Klinglesmith, Daniel A., III; Pravec, Petr; et al. (July 2013). "New Photometry of 1473 Ounas". Bulletin of the Minor Planets (Section of the Association of Lunar and Planetary Observers) 40 (3): 126–129. Bibcode:2013MPBu...40..126P. ISSN 1052-8091. Retrieved November 2015.
    6. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1473) Ounas". Geneva Observatory. Retrieved November 2015.
    7. ↑ "1473 Ounas (1938 UT)". Minor Planet Center. Retrieved November 2015.

    External links


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