172P/Yeung

Jupiter-family comet November 2025 172P/Yeung IAUC_7896 Bill Yeung Apache Point Observatory 21 January 2002 P/2001 CB 40P/2002 BV PK02B00Vcomethunter1 jpldata MPC 21 November 2025 (JD 2461000.5) 31.62 years 20 October 1993 797 3.358 AU 5.091 AU 4.225 AU 0.20507 8.683 years 11.222° 30.881° 208.87° 2.114° 2.958 2.232 AU 0.082 AU jpldata 5.6 km miFernandez_2013 14.8 2 November 2025 19 July 2034Horizons2034 172P/Yeung is a Jupiter-family comet with a 6.59-year orbit around the Sun. It is the first of two comets discovered by Hong Kong/Canadian astronomer, William Kwong Yu Yeung.Bill Yeung later co-discovered C/2015 VL 62 (Lemmon–Yeung–PanSTARRS) in 2015 Observational history It was initially thought as an apparently asteroid-like object from CCD images taken by Bill Yeung from the Apache Point Observatory on the night of 21 January 2002.snews1 Additional reports from the Minor Planet Center later identified that this comet is the same object as 2001 CB 40,IAUC_7896 with precovery images dating as early as 20 October 1993.MPC This relatively long observation arc for a newly discovered comet allowed it to receive a permanent numerical designation from the MPC as 172P.IAUC_8605 Physical characteristics Infrared observations by the Spitzer Space Telescope between 2006 and 2007 revealed that the nucleus of 172P/Yeung is about 5.6 km mi in radius.Fernandez_2013 Notes References W. K. Y. Yeung The accidental discovery of Apollo asteroid 2002BJ2 and periodic comet P/2002 BV (Yeung) https://comethunter.de/yeung.txt comethunter.de 2002 2025-11-26 TXT Y. R. Fernández M. S. P. Kelley P. L. Lamy etal Thermal properties, sizes, and size distribution of Jupiter-family cometary nuclei Icarus 2013 226 1 1138–1170 2013Icar..226.1138F 1307.6191 10.1016/j.icarus.2013.07.021 T. Spahr M. Calkins D. W. Green Comet P/2002 BV P/2001 CB 40 (Yeung) http://www.cbat.eps.harvard.edu/iauc/07800/07896.html IAU Circular 2002-05-09 7896 1 2002IAUC.7896....1S D. W. Green Comets 171P/Spahr and 172P/Yeung http://www.cbat.eps.harvard.edu/iauc/08600/08605.html IAU Circular 2005-09-29 8605 3 2005IAUC.8605....3G 172P/Yeung – JPL Small-Body Database Lookup https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=172P ssd.jpl.nasa.gov 2025-11-26 172P/Yeung Orbit http://www.minorplanetcenter.net/db_search/show_object?object_id=172P Minor Planet Center 2017-04-09 2002 Comet Awards Announced https://spacenews.com/2002-comet-awards-announced/ SpaceNews.com 2002-07-01 2025-11-26 Horizons Batch for 172P/Yeung (90001119) on 2034-Jul-19 JPL Horizons Perihelion occurs when rdot flips from negative to positive https://ssd.jpl.nasa.gov/api/horizons.api?format=text&COMMAND=%27DES%3D172P%3BCAP%27&START_TIME=%272034-Jul-19%27&STOP_TIME=%272034-Jul-19%2012%27&STEP_SIZE=%271%20hour%27&QUANTITIES=%2719%27 2026-04-16 (JPL#104 Soln.date: 2025-Jun-26) External links 1000388 172P 172P/Yeung at the Minor Planet Center database 172P/Yeung at Seiichi Yoshida's website 172P/Yeung on Gary W. Kronk's Cometography 171P/Spahr 173P/Mueller Category:Periodic comets 0172 0172 0172 0172 *