639 Latona
639 Latona is a minor planet orbiting the Sun that was discovered by German astronomer Karl Lohnert on July 19, 1907, at Heidelberg.
| Discovery | |
|---|---|
| Discovered by | K. Lohnert |
| Discovery site | Heidelberg |
| Discovery date | 19 July 1907 |
| Designations | |
| (639) Latona | |
| Pronunciation | /leɪˈtoʊnə/[1] |
| 1907 ZT | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.74 yr (39718 d) |
| Aphelion | 3.3364 AU (499.12 Gm) |
| Perihelion | 2.6969 AU (403.45 Gm) |
| 3.0167 AU (451.29 Gm) | |
| Eccentricity | 0.10600 |
| 5.24 yr (1913.8 d) | |
| 253.886° | |
| 0° 11m 17.196s / day | |
| Inclination | 8.5546° |
| 279.853° | |
| 70.682° | |
| Physical characteristics | |
Mean radius | 35.625±0.85 km |
| 6.193 h (0.2580 d) | |
| 0.1826±0.009 | |
| 8.20 | |
Photometric observations of this asteroid at Palmer Divide Observatory in Colorado Springs, Colorado, during 2007 gave a light curve with a period of 6.139 ± 0.002 hours and a brightness variation of 0.08 ± 0.01 in magnitude. This confirms period measurements of about 6.2 hours reported in 1987 and 2001.[3]
This is a member of the dynamic Eos family of asteroids that most likely formed as the result of a collisional breakup of a parent body.[4]
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- Yeomans, Donald K., "639 Latona", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
- Warner, Brian D. (June 2008), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - June - October 2007", The Minor Planet Bulletin, 35 (2), pp. 56–60, Bibcode:2008MPBu...35...56W.
- Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry" (PDF), Icarus, 114, pp. 186–196, Bibcode:1995Icar..114..186V, CiteSeerX 10.1.1.31.2739, doi:10.1006/icar.1995.1053.
External links
- Lightcurve plot of 639 Latona, Palmer Divide Observatory, B. D. Warner (2007)
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 639 Latona at AstDyS-2, Asteroids—Dynamic Site
- 639 Latona at the JPL Small-Body Database
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