1866 Sisyphus

Largest Apollo asteroid August 2026 yes 1866 Sisyphus #FFC2E0 5 December 1972 P. Wild Zimmerwald Obs. (1866) Sisyphus 1972 XA ˈ s ɪ s ᵻ f ə s Sysiphean s ɪ s ᵻ ˈ f iː ən,Sisyphean Sisyphian s ɪ ˈ s ɪ f i ə nSisyphian Σίσυφος Sīsyphos (Greek mythology) Apollo NEO Mars-crosser 4 September 2017 (JD 2458000.5) 0 61.55 yr (22,482 days) 26 January 1955 2.913 AU Gm on 0.8747312 AU Gm on 1.8936992 AU Gm on 0.5386 2.61 yr (952 days) 85.918° 0.3783 ms / day 41.202° 63.498° 293.09° 1LCDB-Benner-1985(Orbital period of 27.16 0.05 h) 0.1045 AU Gm on 0.1291 AU Gm on 5.72 0.07 km 6.597 0.189 km 6.859 km 6.86 km (taken) 8 kmLCDB-Benner-1985 8.48 km 8.9 km 2.3909 0.0004 h 2.400 h 2.4 hLCDB-Pravec-1998 2.401 0.001 h 2.424 0.001 h 2.7 h 0.14 0.15 0.19 0.07 0.255 0.049 0.360 0.010 0.3719 SMASS S S 9.0 (discovery) 9.3 (2071 close approach) 11.7 0.2 (R)LCDB-Pravec-1998 12.4 12.51 0.149 13.0 1866 Sisyphus ˈ s ɪ s ᵻ f ə s is a binary stony asteroid, near-Earth object and the largest member of the Apollo group, approximately 7 kilometers in diameter. It was discovered on 5 December 1972, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and given the provisional designation 1972 XA. It was named after Sisyphus from Greek mythology. Orbit and classification This S-type asteroid (composed of rocky silicates) orbits the Sun in the inner main-belt at a distance of 0.9–2.9 AU once every 2 years and 7 months (952 days). Its orbit has an eccentricity of 0.54 and an inclination of 41° with respect to the ecliptic. The Apollo asteroid has an Earth minimum orbit intersection distance of 0.1037 AU km on on 3, which corresponds to 40.4 lunar distances. It will pass 0.11581 AU km on off from Earth on 24 November 2071, and will peak at roughly apparent magnitude 9.3 on 26 November 2071. When it was discovered it peaked at magnitude 9.0 on 25 November 1972. It is one of the brightest near-Earth asteroids. Physical characteristics In the SMASS classification, Sisyphus is a common stony S-type asteroid. Binary system In 1985, this object was detected with radar from the Arecibo Observatory at a distance of 0.25 AU. The measured radar cross-section was 8 square kilometers.LCDB-Benner-1985 During the radar observations, a small minor-planet moon was detected around Sisyphus, although its existence was not reported until December 2007. Robert Stephens confirmed that it is a suspected binary, and Brian Warner added additional weight to this conclusion, giving 27.16 0.05 hours as the satellite's orbital period, longer than the 25 hours previously reported by Stephens. Diameter and albedo With a measured mean diameter in the range of 5.7–8.9 kilometers, it is the largest of the Earth-crossing asteroids, comparable in size to the Chicxulub object whose impact contributed to the extinction of the dinosaurs. Larger near-Earth asteroids which are neither classified as Apollos nor Earth-crossers include 1036 Ganymed (32 km), 3552 Don Quixote (19 km), 433 Eros (17 km), and 4954 Eric (10.8 km). Naming This minor planet is named after Sisyphus from Greek mythology and refers to the cruel king of Ephyra, punished by being given the task of rolling a large stone up to a hill in the underworld, only to have it roll down again each time he neared the top. The official 1866 naming citation was published by the Minor Planet Center on 20 December 1974 (M.P.C. 3758). Notes LCDB-Pravec-1998 Pravec (1998web), gives a rotation period of 2.4 hours. Summary figures listed at LCDB LCDB-Benner-1985 Benner (1985), gives a diameter of 8 kilometer. Summary figures listed at LCDB References 30em NASA.gov JPL Small-Body Database Search Engine: asteroids and NEOs and H < 13 (mag) JPL Solar System Dynamics http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=neo;obj_kind=ast;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=OBJ;c1_item=Ai;c1_op=%3C;c1_value=13;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCkCqAiAp;.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=ApA 2013-10-31 (1866) Sisyphus Ephemerides for November 2071 NEODyS (Near Earth Objects Dynamic Site) https://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=1866&oc=500&y0=2071&m0=11&d0=11&h0=0&mi0=0&y1=2071&m1=12&d1=11&h1=0&mi1=0&ti=1.0&tiu=days 2013-10-30 2016-08-15 last obs. JPL Small-Body Database Browser: 1866 Sisyphus (1972 XA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001866 Jet Propulsion Laboratory 9 June 2017 20 December 2016 https://web.archive.org/web/20161220103023/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001866 live last observation: 2013-07-26 JPL Close-Approach Data: 1866 Sisyphus (1972 XA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1866;cad=1#cad 2013-10-30 21 August 2020 https://web.archive.org/web/20200821025151/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1866;cad=1#cad live Dictionary of Minor Planet Names – (1866) Sisyphus Schmadel Lutz D. Springer Berlin Heidelberg 150 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1867 (1866) Sisyphus 1866 Sisyphus (1972 XA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1866 12 December 2016 21 December 2016 https://web.archive.org/web/20161221194755/http://www.minorplanetcenter.net/db_search/show_object?object_id=1866 live Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S Asteroids and comets rotation curves – (1866) Sisyphus Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001866 12 December 2016 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001866 live 6 S. J. Ostro D. B. Campbell J. F. Chandler I. I. Shapiro A. A. Hine R. Velez R. F. Jurgens K. D. Rosema R. Winkler D. K. Yeomans October 1991 Asteroid radar astrometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1991AJ....102.1490O Astronomical Journal 102 1490–1502.ResearchsupportedbyNASA 0004-6256 1991AJ....102.1490O 10.1086/115975 12 December 2016 16 December 2017 https://web.archive.org/web/20171216085825/http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1991AJ....102.1490O live 1866 12 December 2016 20 August 2020 https://web.archive.org/web/20200820213123/http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1866%7CSisyphus live 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 12 December 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 free (online, AcuA catalog p. 153 https://web.archive.org/web/20190325134554/https://core.ac.uk/download/pdf/43545172.pdf 25 March 2019 ) 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 12 December 2016 8 June 2020 https://web.archive.org/web/20200608120302/http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P live 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 12 December 2016 Cristina A. Thomas Joshua P. Emery David E. Trilling Marco Delbó Joseph L. Hora Michael Mueller January 2014 Physical characterization of Warm Spitzer-observed near-Earth objects http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014Icar..228..217T Icarus 228 217–246 2014Icar..228..217T 10.1016/j.icarus.2013.10.004 12 December 2016 1310.2000 2060/20140012047 16 June 2020 https://web.archive.org/web/20200616115651/http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014Icar..228..217T live H. J. Schober A. Erikson G. Hahn C. I. Lagerkvist T. Oja November 1993 Physical Studies of Asteroids. Part XXVI. Rotation and Photoelectric Photometry of Asteroids 323, 350, 582, 1021 and 1866 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1993A&AS..101..499S Astronomy and Astrophysics Supplement 101 3 507 1993A&AS..101..499S 12 December 2016 Gy. M. Szabó B. Csák K. Sárneczky L. L. Kiss August 2001 Photometric observations of 9 Near-Earth Objects http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2001A&A...375..285S Astronomy and Astrophysics 375 285–292 2001A&A...375..285S 10.1051/0004-6361:20010813 12 December 2016 astro-ph/0106017 Robert D. Stephens Linda, M. French Brian D. Warner Lawrence H. Wasserman October 2011 The Curse of Sisyphus http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38..212S The Minor Planet Bulletin 38 4 212–213 1052-8091 2011MPBu...38..212S 12 December 2016 29 January 2020 https://web.archive.org/web/20200129093928/http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38..212S live 6 A. Mainzer T. Grav J. Masiero J. Bauer E. Wright R. M. Cutri R. S. McMillan M. Cohen M. Ressler P. Eisenhardt August 2011 Thermal Model Calibration for Minor Planets Observed with Wide-field Infrared Survey Explorer/NEOWISE http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...736..100M The Astrophysical Journal 736 2 9 2011ApJ...736..100M 10.1088/0004-637X/736/2/100 12 December 2016 Warner, Brian D. October 2016 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 April–July http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..311W The Minor Planet Bulletin 43 4 311–319 1052-8091 2016MPBu...43..311W 12 December 2016 29 January 2020 https://web.archive.org/web/20200129093925/http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..311W live External links W3nU_6XEsck Asteroid Hazards, Part 1: What Makes an Asteroid a Hazard? (min. 6:04) Asteroid Lightcurve Database (LCDB) https://web.archive.org/web/20171210173955/http://www.minorplanet.info/PHP/lcdbsummaryquery.php 10 December 2017 , query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Asteroids with Satellites https://web.archive.org/web/20191218214655/http://www.johnstonsarchive.net/astro/asteroidmoons.html 18 December 2019 , Robert Johnston, johnstonsarchive.net 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 Geneve, Raoul Behrend 1866 1866 Sisyphus 1865 Cerberus 1866 1867 Deiphobus 001866 Category:Discoveries by Paul Wild (Swiss astronomer) Category:Named minor planets 001866 001866 19721205