194 Prokne

Main-belt asteroid October 2019 yes (194) Prokne A879 FA #D6D6D6 Орбита астероида 194.png Orbital diagram 194 Prokne ' p r ɒ k n iːhttp://www.lexico.com/definition/Procne https://web.archive.org/web/20200322185801/https://www.lexico.com/definition/procne dead 22 March 2020 Procne Lexico UK English Dictionary Oxford University Press Proknean p r ɒ k ˈ n iː ə nHarris & Lee (2004) Shakespearean criticism, p. 113 C. H. F. Peters, 1879 21 March 1879 Main belt 2.6158 AU Gm on 1.9930 AU Gm on 3.2386 AU Gm on on 4.23 yr (1545.3 d) 18.509° 0.23810 168.42 4.1 km170.33 6.92 km 2.68 0.29 18 kg 1.03 0.16 g/cm3 15.679 h d on on C 7.68 0.0528 0.003 31 July 2016 (JD 2457600.5) 159.32° 163.24° 42.282° 0.23297 ms / day 136.76 yr (49950 d) 0 0.986917 AU Gm on 2.15988 AU Gm on 3.295 Procne 194 Prokne is a main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on March 21, 1879, in Clinton, New York. It was named after Procne, the sister of Philomela in Greek mythology. Stellar occultations by Prokne have been observed twice, in 1984 from Italy and again in 1999 from Iowa (United States). This asteroid is orbiting the Sun at a distance of 2.62 AU with a moderate eccentricity of 0.238 and an orbital period of 4.23 years. The orbital plane is inclined at an angle of 18.5° to the plane of the ecliptic. Observations from the W. M. Keck Observatory show the asteroid to be around 151 km across, with a size ratio of 1.13 0.06 between the major and minor axes. For comparison, observations by the IRAS observatory gave a diameter of 164 km. The spectrum matches a classification of a C-type asteroid, indicating it has a primitive carbonaceous composition. Judging from radar data, the near surface solid density of the asteroid is 3.61.1 0.9 g cm−3. Based upon a light curve that was generated from photometric observations of this asteroid at Pulkovo Observatory, it has a rotation period of 15.679 0.001 hours and varies in brightness by 0.16 0.02 in magnitude. References Donald K. Yeomans 194 Prokne JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=194 12 May 2016 . F. Marchis M. Kaasalainen E. F. Y. Hom J. Berthier J. Enriquez D. Hestroffer D. Le Mignant I. de Pater 1 Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey Icarus 185 1 39–63 November 2006 2006Icar..185...39M 10.1016/j.icarus.2006.06.001 . 19081813 2600456 B. Carry Density of asteroids Planetary and Space Science 73 98–118 December 2012 10.1016/j.pss.2012.03.009 2012P&SS...73...98C . 1203.4336 See Table 1. Frederick Pilcher Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana The Minor Planet Bulletin 38 4 183–185 October 2011 2011MPBu...38..183P . Magri C. Consolmagno G. J. Ostro S. J. Benner L. A. M. Beeney B. R. 1 Radar constraints on asteroid regolith compositions using 433 Eros as ground truth Meteoritics & Planetary Science 36 12 1697–1709 December 2001 10.1111/j.1945-5100.2001.tb01857.x 2001M&PS...36.1697M . External links 194 193 Ambrosia 194 195 Eurykleia Category:Background asteroids Prokne Prokne Category:C-type asteroids (Tholen) Category:C-type asteroids (SMASS) 18790321 Category:Objects observed by stellar occultation