(225416) 1999 YC

Near-Earth Asteroid April 2026 (225416) 1999 YC #FFC2E0 LINEAR Lincoln Lab's ETS 17 December 1999 (225416) 1999 YC Apollo NEO Mercury-crosser 21 November 2025 (JD 2461000.5) 0 9199 days years on 2.6022 AU 0.2414 AU 1.4218 AU 0.8302 619 days years on 70.92° 0.5813 ms / day 38.263° 64.75° 156.45° 0.24851 AU 1.651 ± 0.175 km 4.531 h 4.4950 ± 0.0010 hObservations of 1999 YC and the Breakup of the Geminid Stream Parent 2008-05-18 Toshihiro Kasuga David Jewitt The Astronomical Journal 136 2 881–889 10.1088/0004-6256/136/2/881 0805.2636 2008AJ....136..881K 0.094 ± 0.027 CObservations of 1999 YC and the Breakup of the Geminid Stream Parent 2008-05-18 Toshihiro Kasuga David Jewitt The Astronomical Journal 136 2 881–889 10.1088/0004-6256/136/2/881 0805.2636 2008AJ....136..881K 17.36 (225416) 1999 YC is a large near-Earth asteroid of the Apollo group. The asteroid was discovered by astronomers at the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory Experimental Test Site.(225416) = 1999 YC https://minorplanetcenter.net/db_search/show_object?object_id=225416 29 January 2026 Minor Planet Center International Astronomical Union 1999 YC has been suggested to be a fragment of 3200 Phaethon.Cukier Wolf Z. Formation, Structure, and Detectability of the Geminids Meteoroid Stream 2023-06-19 2306.11151 Szalay Jamey R. The Planetary Science Journal 4 6 109 10.3847/PSJ/acd538 free 2023PSJ.....4..109C The asteroid does not appear to be a member of the Phaethon-Geminid complex.Ryabova G O Avdyushev V A Williams I P 2019-05-21 Asteroid (3200) Phaethon and the Geminid meteoroid stream complex https://academic.oup.com/mnras/article/485/3/3378/5371165 Monthly Notices of the Royal Astronomical Society en 485 3 3378–3385 10.1093/mnras/stz658 free 0035-8711 subscription Orbit and classification 1999 YC orbits the sun on a highly eccentric orbit at a distance between 0.24 AU and 2.60 AU, about every 1.7 years.4 March 2025 JPL Small-Body Database Browser: 225416 (1999 YC) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20225416 29 January 2026 Jet Propulsion Laboratory 2025-02-02 last obs. Its perihelion is within the orbit of Mercury, making the asteroid a Mercury-crosser. The asteroid is an Apollo asteroid, which means its perihelion is within Earth's orbit and has a semi-major axis larger than 1 AU. Despite 1999 YC's large size, the asteroid is not considered to be a potentially hazardous object due to its minimum orbital intersection distance being 0.25 AU, greater than the 0.05 AU maximum needed. 1999 YC's observation arc begins with a precovery taken at the Fred Lawrence Whipple Observatory on 27 November 1999, 20 days before the official discovery observation made by LINEAR.(225416) = 1999 YC https://minorplanetcenter.net/db_search/show_object?object_id=225416 29 January 2026 Minor Planet Center International Astronomical Union Physical characteristics 1999 YC is a C-type asteroid.Observations of 1999 YC and the Breakup of the Geminid Stream Parent 2008-05-18 Toshihiro Kasuga David Jewitt The Astronomical Journal 136 2 881–889 10.1088/0004-6256/136/2/881 0805.2636 2008AJ....136..881K Measurements from WISE have measured the asteroid's albedo to be between 0.067 and 0.121, corresponding to a size of between 1.5 and 1.8 kilometers. Formation Like most asteroids, it is believed to have formed from the primordial solar nebula as fragments of planetesimals—material in the early Solar System that was not massive enough to become a planet.What Are Asteroids And Comets? http://neo.jpl.nasa.gov/faq/#ast Near Earth Object Program FAQ NASA 13 September 2010 https://web.archive.org/web/20100909210213/http://neo.jpl.nasa.gov/faq/#ast 2010-09-09 live See also (155140) 2005 UD, another fragment of 3200 Phaethon Geminids References External links List of Apollo asteroids – International Astronomical Union Minor Planet Center. 225416 225416 1999YC 225416 225416 225416 19991217 225416