(16960) 1998 QS52

Near-Earth asteroid September 2020 yes (16960) 1998 QS 52 #FFC2E0 LINEAR Lincoln Lab's ETS 25 August 1998 (16960) 1998 QS 52 ApolloNEOPHA 4 September 2017 (JD 2458000.5) 0 34.36 yr (12,551 days) 4.0928 AU 0.3133 AU 2.2030 AU 0.8578 3.27 yr (1,194 days) 244.09° 0.3014 ms / day 17.546° 260.48° 242.95° 0.0144 AU (5.6 LD) 3.3 0.3 km 2.900 0.001 h (alternative)lightcurve-plot-Warner5.789 0.001 h5.8 0.1 h 0.20 (assumed) SMASS SqSr 14.314.79 0.23 (16960) 1998 QS 52 is a stony asteroid on a highly eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 4.1 km mi 2 us in diameter. It was discovered on 25 August 1998, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. This asteroid is one of the largest potentially hazardous asteroids known to exist. Orbit and classification 1998 QS 52 is a member of the dynamical Apollo group, which are Earth-crossing asteroids. Apollo asteroids are the largest subgroup of near-Earth objects. It orbits the Sun at a distance of 0.31–4.1 AU once every 3 years and 3 months (1,194 days; semi-major axis of 2.20 AU). Its orbit has an exceptionally high eccentricity of 0.86 and an inclination of 18° with respect to the ecliptic. The body's observation arc begins with a precovery taken at the Siding Spring Observatory in June 1983, more than 15 years prior to its official discovery observation at Socorro. Close approaches With an absolute magnitude of 14.3, 1998 QS 52 is one of the brightest and largest known potentially hazardous asteroid (see PHA-list). It has an Earth minimum orbital intersection distance of 0.0144 AU km on off 3, which corresponds to 5.6 lunar distances. Its eccentric orbit leads to close approaches with Mercury and Venus and carries it beyond the asteroid belt but not as far as to the orbit of Jupiter (>4.9 AU). It is therefore also a Venus- and Mars-crossing asteroid. Physical characteristics In the SMASS classification, 1998 QS 52 is a Sq-subtype, that transitions between the stony S- and Q-type asteroids. Observers at the NASA Infrared Telescope Facility have also characterized this body as an Sr-type, which transitions to the rare R-type asteroids. Rotation period In 2008, two rotational lightcurves of 1998 QS 52 were obtained independently from photometric observations by Brian Warner at the Palmer Divide Observatory and by Brian Skiff during the Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) . Lightcurve analysis gave a rotation period of 5.789 and 5.8 hours with a brightness amplitude of 0.24 and 1.4 magnitude, respectively (U=2/2). An alternative period solution of 2.9 hours – or half of the above period – is also possible, though considered less likely by Warner.lightcurve-plot-Warner Diameter and albedo 1998 QS 52 has not been observed by any of the space-based surveys such as IRAS, Akari or the Wide-field Infrared Survey Explorer. The Collaborative Asteroid Lightcurve Link assumes a stony standard albedo of 0.20 for its surface, and calculates a diameter of 4.10 kilometers based on an absolute magnitude of 14.3. Numbering and naming This minor planet was numbered by the Minor Planet Center on 13 September 2000. As of 2018, it has not been named. Notes lightcurve-plot-Warner Lightcurve plot of : alternative period solution of 2.900 0.001 hours with a brightness amplitude of 0.24 0.02 mag. Quality Code of 2. Summary figures at the LCDB References 30em 2017-10-24 last obs. JPL Small-Body Database Browser: 16960 (1998 QS52) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2016960 Jet Propulsion Laboratory 17 January 2018 16960 (1998 QS52) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=16960 17 January 2018 List of the Potentially Hazardous Asteroids (PHAs) Minor Planet Center https://www.minorplanetcenter.net/iau/lists/t_phas.html 18 January 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 24 February 2018 16960 17 January 2018 Petrov Dmitry 2025-09-04 Estimation of the Albedo and Diameter of the Asteroid (16960) 1998 QS52 Using the Polarimetric Method Research Notes of the AAS 9 9 233 10.3847/2515-5172/ae01a5 free 2515-5172 Warner, Brian D. January 2009 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36....7W The Minor Planet Bulletin 36 1 7–13 1052-8091 2009MPBu...36....7W 17 January 2018 Brian A. Skiff Edward Bowell Bruce W. Koehn Jason J. Sanborn Kyle P. McLelland Brian D. Warner July 2012 Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) - 2008 May through 2008 December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39..111S The Minor Planet Bulletin 39 3 111–130 1052-8091 2012MPBu...39..111S 17 January 2018 6 M. Popescu M. Birlan R. Binzel P. Vernazza A. Barucci D. A. Nedelcu F. DeMeo M. Fulchignoni November 2011 Spectral properties of eight near-Earth asteroids Astronomy and Astrophysics 535 15 2011A&A...535A..15P 10.1051/0004-6361/201117118 free 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 53493339 17 January 2018 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books 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 16960 16960 1998QS52 2016960 16960 (16960) 1998 QS 52 016960 016960 016960 016960 016960 19980825