197 Arete

197 Arete
Discovery[1]
Discovered by	Johann Palisa
Discovery date	21 May 1879
Designations
MPC designation	(197) Arete
Pronunciation	/əˈriːtiː/[2]
Named after	Arete
Alternative designations	1934 RE1 1950 DY
Minor planet category	Asteroid belt
Orbital characteristics[3][4]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	136.89 yr (50000 d)
Aphelion	3.1882283 AU (476.95216 Gm) (Q)
Perihelion	2.2897600 AU (342.54322 Gm) (q)
Semi-major axis	2.7389941 AU (409.74769 Gm) (a)
Eccentricity	0.1640143 (e)
Orbital period	4.53 yr (1655.7 d)
Mean anomaly	20.361539° (M)
Mean motion	0° 13m 2.744s / day (n)
Inclination	8.793773° (i)
Longitude of ascending node	81.607160° (Ω)
Argument of perihelion	246.46589° (ω)
Earth MOID	1.29448 AU (193.651 Gm)
Jupiter MOID	2.16829 AU (324.372 Gm)
TJupiter	3.314
Physical characteristics[5]
Dimensions	29.18±2.4 km
Rotation period	6.6084 h (0.27535 d)[3]; 6.54 h[6]
Geometric albedo	0.4417±0.083[3]; 0.442[7]
Spectral type	S[8]
Absolute magnitude (H)	9.18[3]

Arete (minor planet designation: 197 Arete) is an asteroid in the asteroid belt. It has a very bright surface, even so when compared to other 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.[9] 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.[10]

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".[11]

References

http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html
Benjamin Smith (1903) The Century Dictionary and Cyclopedia
"JPL Small-Body Database Browser: 197 Arete" (2011-07-02 last obs). Archived from the original on 21 July 2011. Retrieved 18 August 2011.
"AstDys: 197 Arete". Retrieved 18 August 2011.
"The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
http://sbn.psi.edu/pds/resource/lc.html
"Infrared Astronomical Satellite (IRAS)". Archived from the original on 24 February 2005. Retrieved 24 February 2005.
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. (19 April 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 AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
197 Arete at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[1] ttp://cfa-www.harvard.edu/iau/lists/NumberedMPs.html

[2] Benjamin Smith (1903) The Century Dictionary and Cyclopedia

[jpldata-3] "JPL Small-Body Database Browser: 197 Arete" (2011-07-02 last obs). Archived from the original on 21 July 2011. Retrieved 18 August 2011.

[AstDys-4] "AstDys: 197 Arete". Retrieved 18 August 2011.

[lowell-5] "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.

[6] ttp://sbn.psi.edu/pds/resource/lc.html

[7] "Infrared Astronomical Satellite (IRAS)". Archived from the original on 24 February 2005. Retrieved 24 February 2005.

[8] ttp://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT

[9] 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.

[science160_3825-10] Hertz, Hans G. (19 April 1968). "Mass of Vesta". Science. 160 (3825): 299–300. Bibcode:1968Sci...160..299H. doi:10.1126/science.160.3825.299. PMID 17788233.

[aass67_1_95-11] 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.