639 Latona
| Discovery | |
|---|---|
| Discovered by | K. Lohnert |
| Discovery site | Heidelberg |
| Discovery date | 19 July 1907 |
| Designations | |
| 1907 ZT | |
| Orbital characteristics[1] | |
| 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° | |
| Earth MOID | 1.70472 AU (255.022 Gm) |
| Jupiter MOID | 2.06998 AU (309.665 Gm) |
| Jupiter Tisserand parameter | 3.222 |
| Physical characteristics | |
Mean radius | 35.625±0.85 km |
| 6.193 h (0.2580 d) | |
| 0.1826±0.009 | |
| 8.20 | |
|
| |
639 Latona is a minor planet orbiting the Sun that was discovered by German astronomer Karl Julius Lohnert on July 19, 1907 at Heidelberg.
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.[2]
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.[3]
References
- ↑ 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", Icarus, 114, pp. 186–196, Bibcode:1995Icar..114..186V, CiteSeerX 10.1.1.31.2739
, doi:10.1006/icar.1995.1053.
External links
- Discovery Circumstances: Numbered Minor Planets
- NASA's Jet Propulsion Laboratory Datasite page on this space object
- 639 Latona at the JPL Small-Body Database
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