123 Brunhild

Main-belt asteroid September 2018 yes #D6D6D6 123 Brunhild 123 Brunhild.png Christian Heinrich Friedrich Peters 31 July 1872 (123) Brunhild A872 OB ' b r uː n h ɪ l dBenjamin Smith (1903) The Century Dictionary and Cyclopedia Brynhildr Main belt 31 July 2016 (JD 2457600.5) 2.69710 AU Gm on 2.37594 AU Gm on 3.0183 AU Gm on on 0.11907 4.43 yr (1617.9 d) 6.4142° 307.834° 125.960° 96.8286° 18.08 km/s 48 km 1.217 kg (assumed) 0.0134 m/s2 0.0254 km/s 10.04 h d on on S 11.77 to 14.88 8.9 0.2134 0.026 ~170 K 0.222515 ms / day 143.71 yr (52490 days) 0 23.985 1.3 km 1.39621 AU Gm on 2.22588 AU Gm on 3.350 123 Brunhild is a stony S-type main-belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on July 31, 1872, and named after Brünnehilde, a Valkyrie in Norse mythology. Brunhild has been mistaken for the non-existent variable star KN Gem. In 1983, 123 Brunhild was observed photometrically from the Observatoire de Haute-Provence, producing an irregular light curve that showed eight extremes, including two minima and two maxima that were more accentuated than the others. This curve indicates an irregular shape or possibly areas with higher albedo, with a rotation period of 10.04 ± 0.02 hours and a brightness variation of 0.16 ± 0.01 in magnitude. Based upon IRAS observations, the estimated diameter of this asteroid is 47.97 ± 2.6 km with a geometric albedo of 0.2134 ± 0.026. A smaller diameter value of 41.33 ± 1.73 km is obtained from the Midcourse Space Experiment observations, with an accordingly higher albedo of 0.2886 ± 0.0247. References Donald K. Yeomans 123 Brunhild JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=123 30 April 2016 . Barucci M. A. di Martino M. Rotational rates of very small asteroids - 123 Brunhild, 376 Geometria, 437 Rhodia and 1224 Fantasia Astronomy and Astrophysics Supplement Series 57 103–106 July 1984 1984A&AS...57..103B . Tedesco Edward F. Egan Michael P. Price Stephan D. 1 The Midcourse Space Experiment Infrared Minor Planet Survey The Astronomical Journal 124 124 583–591 July 2002 10.1086/340960 2002AJ....124..583T 117767351 . free The International Variable Star Index: KN Gem American Association of Variable Star Observers (AAVSO) http://www.aavso.org/vsx/index.php?view=detail.top&oid=14541 2011-12-31 External links Brunhild 123 122 Gerda 123 124 Alkeste 000123 Category:Discoveries by Christian Peters Category:Named minor planets 000123 000123 18720731 Category:Brunhild