437 Rhodia

437 Rhodia

Discovery
Discovered by	Auguste Charlois
Discovery date	16 July 1898
Designations
MPC designation	(437) Rhodia
Pronunciation	/roʊˈdaɪə/[1]
Named after	Ῥόδεια Rhodeia
Alternative designations	1898 DP
Minor planet category	Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	117.73 yr (43,001 d)
Aphelion	2.9793 AU (445.70 Gm)
Perihelion	1.79242 AU (268.142 Gm)
Semi-major axis	2.38586 AU (356.920 Gm)
Eccentricity	0.24873
Orbital period (sidereal)	3.69 yr (1,346.1 d)
Mean anomaly	355.267°
Mean motion	0° 16^m 2.82^s / day
Inclination	7.3442°
Longitude of ascending node	263.22°
Argument of perihelion	62.058°
Physical characteristics
Dimensions	13.12±0.7 km[2]
Synodic rotation period	56 h (2.3 d)
Geometric albedo	0.7035±0.084[2][3]
Absolute magnitude (H)	10.41[2]

437 Rhodia is a Main belt asteroid that was discovered by French astronomer Auguste Charlois on 16 July 1898 in Nice. It was named after one of the Oceanid nymphs of Greek mythology.^[4] This asteroid is orbiting the Sun at a distance of 2.39 AU with a period of 3.69 years and an eccentricity (ovalness) of 0.25. The orbital plane is tilted at an angle of 7.3° to the plane of the ecliptic.^[2] 437 Rhodia was originally a proposed fly-by target of interest for the Rosetta mission.^[5]

Analysis of the bimodal light curve generated using photometric data show a lengthy rotation period of 433.2 ± 0.5 hours (18.05 ± 0.02 days) with a brightness variation of 0.35±0.05 in magnitude. It also appears to be tumbling.^[6] 437 Rhodia is classified as an E-type asteroid with a diameter of approximately 13 km. This object has the highest albedo in the IRAS dataset, with a value of 0.70±0.08.^[7]

References

1. Noah Webster (1884) A Practical Dictionary of the English Language
2. "JPL Small-Body Database Browser: 437 Rhodia (1898 DP)" (2008-05-13 last obs). Retrieved 10 May 2016.
3. Johnston, Wm. Robert (28 June 2003). "Asteroid albedos: graphs of data". Johnston's Archive. Archived from the original on 17 May 2008. Retrieved 16 June 2008.
4. Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 48, ISBN 9783642297182.
5. Barucci, M. A.; et al. (January 2005), "Asteroid target selection for the new Rosetta mission baseline. 21 Lutetia and 2867 Steins" (PDF), Astronomy and Astrophysics, 430: 313–317, Bibcode:2005A&A...430..313B, doi:10.1051/0004-6361:20041505.
6. Pilcher, Frederick; Polakis, Tom (July 2018), "A Photometric Study of 437 Rhodia", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 45 (3): 287–289, Bibcode:2018MPBu...45..287P.
7. Fornasier, S.; et al. (July 2008), "Visible and near infrared spectroscopic investigation of E-type asteroids, including 2867 Steins, a target of the Rosetta mission" (PDF), Icarus, 196 (1): 119–134, Bibcode:2008Icar..196..119F, doi:10.1016/j.icarus.2008.02.015, S2CID 122794657.

External links

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