197 Arete

Main-belt asteroid October 2019 yes #D6D6D6 197 Arete ə ˈ r iː t iːBenjamin Smith (1903) The Century Dictionary and Cyclopedia Arete (197) Arete A879 KA; 1934 RE 1;1950 DY Орбита астероида 197.png Orbital diagram Johann Palisa 21 May 1879 http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html dead https://web.archive.org/web/19991117144658/http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html 17 November 1999 Discovery Circumstances: Numbered Minor Planets Asteroid belt 2011-07-02 last obs JPL Small-Body Database Browser: 197 Arete http://ssd.jpl.nasa.gov/sbdb.cgi#top 2011-08-18 https://web.archive.org/web/20110721054158/http://ssd.jpl.nasa.gov/sbdb.cgi 21 July 2011 liveAstDys: 197 Arete https://newton.spacedys.com/astdys/index.php?pc=1.1.0&n=arete 2011-08-18 31 July 2016 (JD 2457600.5) 3.1882283 AU Gm on on (Q) 2.2897600 AU Gm on (q) 2.7389941 AU Gm on (a) 0.1640143 (e) 4.53 yr (1655.7 d) 8.793773° (i) 81.607160° (Ω) 20.361539° (M) 246.46589° (ω) http://ftp.lowell.edu/pub/elgb/astorb.html astorb The Asteroid Orbital Elements Database Lowell Observatory 29.18 2.4 km 6.6084 h d on on6.54 hhttp://sbn.psi.edu/pds/resource/lc.html Asteroid Lightcurve Data Base (LCDB) | PDS SBN Asteroid/Dust Subnode 0.4417 0.0830.442http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html Infrared Astronomical Satellite (IRAS) 2005-02-24 dead https://web.archive.org/web/20050224095554/http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html 2005-02-24 Shttp://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT Asteroid Lightcurve Data File, Updated March 1, 2001 https://web.archive.org/web/20100720152333/http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT live 20 July 2010 9.18 0.2174290 ms / day (n) 136.89 yr (50000 d) 0 1.29448 AU Gm on 2.16829 AU Gm on 3.314 197 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.Schmadel Lutz D. Dictionary of minor planet names 1 5th 2003 Springer-Verlag Berlin Heidelberg New York 3-540-00238-3 32–33 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. 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". References Hertz, Hans G. Mass of Vesta Science April 19, 1968 160 3825 299–300 10.1126/science.160.3825.299 17788233 1968Sci...160..299H 2555834 di Martino M. Zappala V. de Campos J. A. Debehogne H. Lagerkvist C.-I. Rotational properties and lightcurves of the minor planets 94, 107, 197, 201, 360, 451, 511 and 702 Astronomy and Astrophysics Supplement Series September 1988 67 1 95–101 1987A&AS...67...95D . External links 197 196 Philomela 197 198 Ampella Category:Background asteroids Arete Arete Category:S-type asteroids (Tholen) Category:S-type asteroids (SMASS) 18790521