134 Sophrosyne

Main-belt asteroid October 2019 yes #D6D6D6 134 Sophrosyne Karl Theodor Robert Luther 27 September 1873 Düsseldorf, North Rhine-Westphalia, Germany (134) Sophrosyne A873 SAThe MPC notates Sophrosyne's retroactive new-style designation as 1873 SA. s oʊ ' f r ɒ s ᵻ n iːNoah Webster (1884) A Practical Dictionary of the English Language Main belt 31 July 2016 (JD 2457600.5) 2.56295 AU Gm on 2.26311 AU Gm on 2.86280 AU Gm on on 0.11699 4.10 yr (1498.7 d) 11.6018° 345.986° 84.7156° 229.885° 18.54 km/s 108112.188 km (1.267 ± 0.575/0.398)18 kg 1.713 ± 0.778/0.538 g/cm3 0.001267 54 4 m/s2 0.001267 54 4 km/s 17.190 h d on on C (Tholen) 9.04, 8.770 0.0364 0.0010.0436 ± 0.0122 ~174 K 0.240211 ms / day 138.60 yr (50625 d) 0 1.31034 AU Gm on 2.42537 AU Gm on 3.396 sophrosyne 134 Sophrosyne.png Lightcurve-based 3D model of 134 Sophrosyne 134 Sophrosyne is a large main-belt asteroid that was discovered by German astronomer Robert Luther on 27 September 1873. It was named after the concept of sophrosyne, Plato's term for 'moderation'. Classified as a C-type asteroid, 134 Sophrosyne has an exceedingly dark surface and most probably a primitive carbonaceous composition.September 2020 This object is orbiting the Sun at a distance of 2.86 AU with an eccentricity of 0.12 and an orbital period of 4.10 years. The orbital plane is inclined at an angle of 11.6° to the plane of the ecliptic. An occultation of a star by 134 Sophrosyne was observed 24 November 1980, in the United States. Timing information from this event allowed a diameter estimate of 110 km to be derived. This is similar to diameter estimates of 108 and 112 km, achieved by other techniques. Photometric observations of the asteroid in 2015 produced a lightcurve indicating a rotation period of 17.190 0.001 h with a variation amplitude of 0.28 0.01 in magnitude. This provided a good match to the only previous determination in 1989. Notes References (134) Sophrosyne = 1873 SA https://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=134 Minor Planet Center 6 November 2025 Rotation Period Determination for 134 Sophrosyne, 521 Brixia and 873 Mechthild Pilcher Frederick The Minor Planet Bulletin 42 4 280–281 October 2015 2015MPBu...42..280P . Donald K. Yeomans 134 Sophrosyne JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=134 12 May 2016 . Pravec P. Harris A. W. Kusnirak P. Galad A. Hornoch K. 1 Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan 1667 May 2012 2012LPICo1667.6089P . Taylor G. E. Progress in accurate determinations of diameters of minor planets Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, June 20–22, 1983 107–109 1983acm..proc..107T . Fienga A. Avdellidou C. Hanuš J. February 2020 Asteroid masses obtained with INPOP planetary ephemerides https://academic.oup.com/mnras/article/492/1/589/5658701 Monthly Notices of the Royal Astronomical Society 492 1 10.1093/mnras/stz3407 free subscription External links 134 133 Cyrene 134 135 Hertha Category:Background asteroids Sophrosyne Sophrosyne Category:C-type asteroids (Tholen) Category:Ch-type asteroids (SMASS) 18730927 Category:Objects observed by stellar occultation