(86039) 1999 NC43

Asteroid October 2019 yes (86039) 1999 NC 43 #FFC2E0 14 July 1999 LINEAR Lincoln Lab's ETS (86039) 1999 NC 43 ApolloNEOPHA 4 September 2017 (JD 2458000.5) 0 15.04 yr (5,492 days) 2.7785 AU 0.7400 AU 1.7593 AU 0.5794 2.33 yr (852 days) 199.72° 0.4224 ms / day 7.1239° 311.76° 120.61° 0.0243 AU9.5 LD 1.43 0.07 km2.22 km 34.29 0.06 h34.49 0.18 hlcdb-Pravec 0.130.140.352 0.039 SMASS = Q 16.016.0816.1 (86039) 1999 NC 43 is an asteroid on an eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2 kilometers in diameter. This suspected tumbler and relatively slow rotator was discovered by LINEAR in 1999. Discovery The asteroid was discovered on 14 July 1999, by the Lincoln Near-Earth Asteroid Research (LINEAR) team at Lincoln Laboratory's Experimental Test Site, near Socorro, New Mexico, USA, at an apparent magnitude of 18, using a 1.0-meter reflector. Its first observation was made by the Catalina Sky Survey in June 1999, extending the asteroid's observation arc by one month prior to its official discovery observation. Orbit and classification 1999 NC 43 has a well-determined orbit with an uncertainty of 0. The body orbits the Sun at a distance of 0.7–2.8 AU once every 2 years and 4 months (852 days). Its orbit has an eccentricity of 0.58 and an inclination of 7° with respect to the ecliptic. Its Earth minimum orbit intersection distance is 0.0243 AU km on off 3, which corresponds to 9.5 lunar distances. Its most notable close approach to Earth will be on 14 February 2173 at a distance of 0.03361 AU km on off. The asteroid also makes close approaches to Venus and Mars. Physical characteristics The rare Q-type asteroid is one of only 20 characterized bodies of this spectral type in the SMASS taxonomic scheme. Rotation period Several rotational lightcurves were obtained from photometric observations by Czech astronomer Petr Pravec at Ondřejov Observatory and American astronomer Brian Warner at his private Palmer Divide Observatory, Colorado. Best rated results gave a rotation period of 34.49 0.18 hours with an exceptionally high brightness variation of 1.1 magnitude (U=n.a.).lcdb-Pravec Pravec's alternative period of 122 hours was later not supported by Warner. However, there are still other periods possible due to sparse photometric data points. The asteroid is also suspected to be in a tumbling motion, which makes the determination of its period more complex. For an asteroid of its size, it is a relatively slow rotator. Diameter and albedo According to the survey carried out by the Japanese Akari satellite, the asteroid has a high albedo of 0.35 and a diameter of 1.43 kilometers. Observations by the Keck Observatory in the thermal infrared gave a refined albedo of 0.13–0.14 with a larger diameter of 2.22 kilometers. Chelyabinsk meteor fragment 1999 NC 43 is suspected to be related to the 20-meter Chelyabinsk meteor, which exploded as a bright fireball over Russia on 15 February 2013. Analysis showed similar orbits for both bodies and suggested that they were once part of the same object. Numbering and naming This minor planet was numbered by the Minor Planet Center on 30 August 2004. As of 2018, it has not been named. Notes lcdb-Pravec Pravec (2000) web: rotation period 34.49 0.18 hours with a brightness amplitude of 1.1 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (86039) References 30em 2014-06-24 last obs. JPL Small-Body Database Browser: 86039 (1999 NC43) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2086039 Jet Propulsion Laboratory 1 June 2017 MPEC 1999-O15 : 1999 NC43 IAU Minor Planet Center 1999-07-19 https://minorplanetcenter.net/mpec/J99/J99O15.html 2013-11-09 (J99N43C) JPL Close-Approach Data: 86039 (1999 NC43) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1999NC43;cad=1#cad 2013-11-09 JPL Small-Body Database Search Engine: spec. type = Q (SMASSII) JPL Solar System Dynamics http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=OBJ;c1_item=Ax;c1_op=%3D;c1_value=Q;table_format=HTML;max_rows=50;format_option=comp;c_fields=AcBhBgBjBiBnBsChAiAx;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AxA 1 March 2016 6 Jiří Borovička Pavel Spurný Peter Brown Paul Wiegert Pavel Kalenda David Clark Lukás Shrbený November 2013 The trajectory, structure and origin of the Chelyabinsk asteroidal impactor http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013Natur.503..235B Nature 503 7475 235–237 2013Natur.503..235B 10.1038/nature12671 1 March 2016 24196708 Schiermeier Quirin Risk of massive asteroid strike underestimated http://www.nature.com/news/risk-of-massive-asteroid-strike-underestimated-1.14114 Nature News Nature Publishing Group 7 November 2013 86039 (1999 NC43) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=86039 1 March 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 24 February 2018 86039 1 March 2016 Marco Delbó Alan W. Harris Richard P. Binzel Petr Pravec John K. Davies November 2003 Keck observations of near-Earth asteroids in the thermal infrared http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003Icar..166..116D Icarus 166 1 116–130 2003Icar..166..116D 10.1016/j.icarus.2003.07.002 1 March 2016 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 (online, AcuA catalog p. 153) Marco Delbo Kevin Walsh Michael Mueller Alan W. Harris Ellen S. Howell Ellen Howell March 2011 The cool surfaces of binary near-Earth asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011Icar..212..138D Icarus 212 1 138–148 2011Icar..212..138D 10.1016/j.icarus.2010.12.011 1 March 2016 Warner, Brian D. July 2014 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January–March http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..157W The Minor Planet Bulletin 41 3 157–168 1052-8091 2014MPBu...41..157W 1 March 2016 Warner, Brian D. October 2014 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 March–June http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..213W The Minor Planet Bulletin 41 4 213–224 1052-8091 2014MPBu...41..213W 1 March 2016 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 26 May 2016 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend 86039 86039 1999NC43 86039 (86039) 1999 NC 43 086039 086039 086039 086039 19990714