339 Dorothea

339 Dorothea

Orbital diagram
Discovery
Discovered by	Max Wolf
Discovery date	25 September 1892
Designations
MPC designation	(339) Dorothea
Pronunciation	/dɒəˈθiːə/[1]
Named after	Dorothea Klumpke
Alternative designations	1892 G
Minor planet category	Main belt (Eos)
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	123.55 yr (45128 d)
Aphelion	3.3041 AU (494.29 Gm)
Perihelion	2.71937 AU (406.812 Gm)
Semi-major axis	3.01176 AU (450.553 Gm)
Eccentricity	0.097082
Orbital period (sidereal)	5.23 yr (1909.1 d)
Mean anomaly	271.598°
Mean motion	0° 11^m 18.852^s / day
Inclination	9.9640°
Longitude of ascending node	173.512°
Argument of perihelion	164.360°
Physical characteristics
Dimensions	38.25±1.6 km
Synodic rotation period	5.974 h (0.2489 d)
Geometric albedo	0.2431±0.021
Spectral type	S (Tholen) K (SMASSII)
Absolute magnitude (H)	9.24

339 Dorothea is a large main belt asteroid that was discovered by German astronomer Max Wolf on 25 September 1892 in Heidelberg.

This is a member of the dynamic Eos family of asteroids that were probably formed as the result of a collisional breakup of a parent body.^[3]

This asteroid is named after astronomer Dorothea Klumpke,^[4] as is 1040 Klumpkea.

References

1. Noah Webster (1884) A Practical Dictionary of the English Language
2. Yeomans, Donald K., "339 Dorothea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
3. Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry", Icarus, vol. 114, pp. 186–196, Bibcode:1995Icar..114..186V, CiteSeerX 10.1.1.31.2739, doi:10.1006/icar.1995.1053, retrieved 6 April 2013.
4. Vatican Observatory website

External links

• 339 Dorothea at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 339 Dorothea at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters