1685 Toro
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Discovery
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|---|---|
| Discovered by | Carl A. Wirtanen |
| Discovery date | 17 July 1948 |
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Designations
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| Alternate name(s) | 1948 OA |
| Minor planet category |
Apollo, Mars crosser |
| Epoch 1 December 2005 (JD 2453705.5) | |
| Aphelion | 1.963 AU |
| Perihelion | 0.771 AU |
| Semi-major axis | 1.367 AU |
| Eccentricity | 0.436 |
| Orbital period | 583.957 d |
| Average orbital speed | 24.217 km/s |
| Mean anomaly | 266.113° |
| Inclination | 9.380 ° |
| Longitude of ascending node | 274.355° |
| Argument of perihelion | 127.037° |
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Physical characteristics
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| Dimensions | 3 km[1] |
| Rotation period | 10.2 h |
| Albedo | .31 |
| Spectral type | S |
| Absolute magnitude (H) | 14.0–14.4 |
1685 Toro is an Apollo asteroid that orbits the Sun in an 8:5 resonance with Earth, and a 13:5 resonance with Venus. Because of this unusual orbit, it is sometimes referenced as "Earth's second satellite".[2]
Toro was discovered by Carl A. Wirtanen at the Lick Observatory in 1948.[1] It was the third Apollo asteroid to be discovered. The name honours Betulia Toro, wife of the astronomer Samuel Herrick. Herrick had studied the asteroid's orbit, and requested the name, along with that of 1580 Betulia.[3][4]
Based on orbital paths, 1685 Toro is the best candidate for the source of the Sylacauga meteorite, the only meteorite known to have injured a human being, when it struck and bruised Mrs. Ann Hodges of Sylacauga, Alabama, on 30 November 1954.[5]
[edit] References
- ^ a b Waldemar Kaempffert (26 December 1948). "Science in Review: Research Work in Astronomy and Cancer Lead Year's List of Scientific Developments". The New York Times: p. 87. ISSN 1494850. http://select.nytimes.com/gst/abstract.html?res=F00F1EFE3F5E167B93C4AB1789D95F4C8485F9. Retrieved 4 August 2011.
- ^ Bruce Duensing (Monday, 16 February 2009). "Ruminations On An Asteroid Named 1685 Toro". Intangible Materiality. http://materialintangible.blogspot.com/2009/02/ruminations-on-asteroid-named-1685-toro.html. Retrieved 4 August 2011.
- ^ Schmadel, Lutz D. (2009). Dictionary of Minor Planet Names: Addendum to Fifth Edition: 2006–2008. Berlin: Springer Berlin. ISBN 9783642019647. http://books.google.com/books?id=uwGbkbhMVyAC&printsec=frontcover&source=gbs_v2_summary_r&cad=0#v=onepage&q&f=false. Retrieved 4 August 2011.
- ^ University of California, Samuel Herrick, Engineering; Astronomy: Los Angeles
- ^ H. Povenmire. The Sylacauga, Alabama Meteorite: The Impact Locations, Atmosphere Trajectory, Strewn Field and Radiant. H.Povenmire. Abstracts of the Lunar and Planetary Science Conference, volume 26, page 1133, (1995)
[edit] External links
- NeoDys
- NASA JPL Small-Body Database Browser on 1685 Toro
- telnet://ssd.jpl.nasa.gov:6775 telnet for JPL Horizons, easier and more comprehensive than web version
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