(155140) 2005 UD

Eccentric near-Earth asteroid yes (155140) 2005 UD #FFC2E0 Catalina Sky Srvy. Catalina Stn. 22 October 2005 (155140) 2005 UD NEOApollo 1 July 2020 (JD 2459396.5) 0 38.76 yr (14,157 days) 11 November 1982 2.387 AU 0.1629 AU 1.275 AU 0.8722 1.44 yr (525.8 days) 1.976° 0.6847295 ms / day 28.660° 19.714° 207.603° 0.07759 AU km 0.09496 AU km 0.07997 AU km 0.04058 AU km 1.28 0.02 km 5.23400 0.00004 0.00001 h -25.8 5.3 12.5 ° 285.8 1.1 5.3 ° 0.14 0.02 C 17.0 (discovery) 17.22 0.0317.51 0.0217.42 (155140) 2005 UD is an asteroid on an eccentric orbit, classified as a near-Earth object of the Apollo group. It was discovered on 22 October 2005, by the Catalina Sky Survey at the Catalina Station in Arizona, United States. 2005 UD is thought to be a possible fragment of 3200 Phaethon due to its similar orbit, although it is not dynamically associated with the Geminid meteor stream produced by Phaethon. Due to 2005 UD's highly eccentric orbit, it experiences extreme temperature variations up to 975 K C F at perihelion, leading to thermal fracturing of its surface regolith and ejection of dust particles. However, no activity from 2005 UD has been observed as of yet, though it has been suspected that it could be the inactive parent body of the Daytime Sextantids meteor shower. 2005 UD and Phaethon share a bluish surface color at visible wavelengths, but differ at near-infrared wavelengths where 2005 UD appears redder than Phaethon. 2005 UD passed 0.0558 AU e6km unit on from Mars on 20 July 2024. +Potential Family Members Object Size EarthMOID(AU) Perihelion(AU) MarsMOID(AU)3200 Phaethon 6 km 0.02 AU e6km unit on 0.14 AU e6km unit 0.14 AU e6km unit(155140) 2005 UD 1.3 km 0.08 AU e6km unit 0.16 AU e6km unit 0.04 AU e6km unit(225416) 1999 YC 1.7 km 0.25 AU e6km unit 0.24 AU e6km unit 0.10 AU e6km unit See also Active asteroid (196256) 2003 EH 1, a suspected extinct comet and proposed parent body of the Quadrantids meteor shower (225416) 1999 YC, another fragment of 3200 Phaethon References 30em 2022-10-31 last obs. JPL Small-Body Database Browser: 155140 (2005 UD) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2005UD&view=OPC Jet Propulsion Laboratory 5 September 2021 (155140) = 2005 UD http://www.minorplanetcenter.net/db_search/show_object?object_id=155140 Minor Planet Center International Astronomical Union 5 September 2021 MPEC 2005-U22: 2005 UD https://minorplanetcenter.net/mpec/K05/K05U22.html Minor Planet Electronic Circular Minor Planet Center 23 October 2005 5 September 2021 MPEC 2005-X10: 2005 UD https://minorplanetcenter.net/mpec/K05/K05X10.html Minor Planet Electronic Circular Minor Planet Center 2 December 2005 5 September 2021 K. Ohtsuka T. Sekiguchi D. Kinoshita J.-I. Watanabe T. Ito H. Arakida T. Kasuga Apollo asteroid 2005 UD: split nucleus of (3200) Phaethon? https://www.aanda.org/articles/aa/pdf/2006/18/aahl142.pdf Astronomy & Astrophysics May 2006 450 3 L25–L28 free 10.1051/0004-6361:200600022 2006A&A...450L..25O 120802314 David Jewitt Henry Hsieh Physical Observations of 2005 UD: A Mini-Phaethon The Astronomical Journal October 2006 132 4 1624–1629 10.1086/507483 2006AJ....132.1624J 121479835 etal D. Kinoshita K. Ohtsuka T. Sekiguchi J. Watanabe H. Ito T. Arakida Surface heterogeneity of 2005 UD from photometric observations https://www.aanda.org/articles/aa/pdf/2007/18/aa6276-06.pdf Astronomy & Astrophysics May 2007 466 3 1153–1158 free 10.1051/0004-6361:20066276 2007A&A...466.1153K 55255286 etal J. Hanuš D. Vokrouhlický M. Delbo' D. Farnocchia D. Polishook P. Pravec (3200) Phaethon: Bulk density from Yarkovsky drift detection https://www.aanda.org/articles/aa/pdf/2018/12/aa34228-18.pdf Astronomy & Astrophysics December 2018 620 L8 free 10.1051/0004-6361/201834228 1811.10953 2018A&A...620L...8H 119378304 G. O. Ryabova V. A. Avdyushev I. P. Williams Asteroid (3200) Phaethon and the Geminid meteoroid stream complex Monthly Notices of the Royal Astronomical Society May 2019 485 3 3378–3385 10.1093/mnras/stz658 free 2019MNRAS.485.3378R 126849510 etal Maxime Devogèle Eric MacLennan Annika Gustafsson Nicholas Moskovitz Joey Chatelain Galin Borisov New Evidence for a Physical Link between Asteroids (155140) 2005 UD and (3200) Phaethon The Planetary Science Journal June 2020 1 1 15 free 10.3847/PSJ/ab8e45 2020PSJ.....1...15D 219521769 10138/588828 free J.-N. Huang K. Muinonen T. Chen X.-B. Wang Photometric study for near-Earth asteroid (155140) 2005 UD Planetary and Space Science June 2020 195 105120 10.1016/j.pss.2020.105120 2008.11442 2021P&SS..19505120H 221319706 Eric MacLennan Athanasia Toliou Mikael Granvik Dynamical evolution and thermal history of asteroids (3200) Phaethon and (155140) 2005 UD Icarus September 2020 366 114535 10.1016/j.icarus.2021.114535 2010.10633 2021Icar..36614535M 224814434 Theodore Kareta Vishnu Reddy Neil Pearson Juan A. Sanchez Walter M. Harris Investigating the Relationship between (3200) Phaethon and (155140) 2005 UD through Telescopic and Laboratory Studies The Planetary Science Journal September 2021 2 5 190 free 10.3847/PSJ/ac1bad 2109.01020 2021PSJ.....2..190K Cukier W. Z. Szalay J. R. Formation, Structure, and Detectability of the Geminids Meteoroid Stream The Planetary Science Journal 4 6 109 June 1, 2023 10.3847/psj/acd538 2632-3338 2306.11151 free 2023PSJ.....4..109C JPL Small-Body Database Browser: 225416 (1999 YC) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=1999YC&view=OPC Jet Propulsion Laboratory External links Exploring Links Between Nearby Asteroids, Susanna Kohler, AAS Nova, 19 June 2020 155140 2155140 155140 (155140) 2005 UD Astronomy Stars Spaceflight Solar System Science Category:Apollo asteroids # Category:Discoveries by the Catalina Sky Survey Category:Mercury-crossing asteroids Category:Venus-crossing asteroids Category:Earth-crossing asteroids Category:Mars-crossing asteroids Category:C-type asteroids (Tholen) 20180928 20051022