197 Arete
| Discovery[1] | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 1879-05-21 |
| Designations | |
| Pronunciation | /əˈriːtiː/ ə-REE-tee |
Named after | Arete |
| 1934 RE1 1950 DY | |
| Asteroid belt | |
| Orbital characteristics[2][3] | |
| Epoch August 27, 2011 | |
| Aphelion | 3.1790723 AU (Q) |
| Perihelion | 2.3005757 AU (q) |
| 2.7398240 AU (a) | |
| Eccentricity | 0.1603199 |
| 4.54 yr (1656.4656 d) | |
| 349.14185° (M) | |
| Inclination | 8.79334° |
| 81.65294° (Ω) | |
| 246.54836° (ω) | |
| Physical characteristics | |
| Dimensions | 29.2 km |
| 6.54 h[4] | |
| Albedo | 0.442[5] |
Spectral type | S[6] |
| 9.18[2] | |
|
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197 Arete is an asteroid in the asteroid belt. It has a very bright surface, unusually bright even for a rocky S-type asteroid.
It was discovered by J. Palisa on May 21, 1879, and named after Arete, the mother of Nausicaa in Homer's The Odyssey.[7] Every 18 years, this asteroid approaches within 0.04 AU of 4 Vesta. During these encounters, Vesta causes a gravitational perturbation of Arete, allowing the mass of Vesta to be directly determined.[8]
Photometric observations during 1984 showed a rotation period of 6.54 ± 0.02 hours and a brightness variation of 0.10 ± 0.01 in magnitude. The light curve shows "four well defined extrema with two asymmetric maxima".[9]
References
- ↑ http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html
- 1 2 "JPL Small-Body Database Browser: 197 Arete" (2011-07-02 last obs). Archived from the original on 21 July 2011. Retrieved 2011-08-18.
- ↑ "AstDys: 197 Arete". Retrieved 2011-08-18.
- ↑ http://sbn.psi.edu/pds/resource/lc.html
- ↑ http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html
- ↑ http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT
- ↑ Schmadel, Lutz D. (2003). Dictionary of minor planet names 1 (5th ed.). Berlin Heidelberg New York: Springer-Verlag. pp. 32–33. ISBN 3-540-00238-3.
- ↑ Hertz, Hans G. (April 19, 1968). "Mass of Vesta". Science 160 (3825): 299–300. Bibcode:1968Sci...160..299H. doi:10.1126/science.160.3825.299. PMID 17788233.
- ↑ di Martino, M.; Zappala, V.; de Campos, J. A.; Debehogne, H.; Lagerkvist, C.-I. (September 1988), "Rotational properties and lightcurves of the minor planets 94, 107, 197, 201, 360, 451, 511 and 702", Astronomy and Astrophysics Supplement Series 67 (1): 95–101, Bibcode:1987A&AS...67...95D.
External links
- 197 Arete at the JPL Small-Body Database
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