Stony asteroid
1866 Sisyphus /ˈ s ɪ s ɪ f ə s binary [ 8] asteroid ,near-Earth object and the largest member of theApollo group , approximately 7 kilometers in diameter.
It was discovered on 5 December 1972, by Swiss astronomerPaul Wild atZimmerwald Observatory near Bern, Switzerland, and given the provisional designation1972 XA Sisyphus fromGreek mythology .[ 3] [ 20]
Orbit and classification [ edit ] ThisS-type asteroid (composed of rocky silicates) orbits the Sun in theinner main-belt at a distance of 0.9–2.9 AU once every 2 years and 7 months (952 days). Its orbit has aneccentricity of 0.54 and aninclination of 41° with respect to theecliptic .[ 1]
The Apollo asteroid has an Earthminimum orbit intersection distance of 0.1037 AU (15,500,000 km ), which corresponds to 40.4lunar distances .[ 1] [ 21] apparent magnitude 9.3 on 26 November 2071.[ 22]
Physical characteristics [ edit ] In theSMASS classification , Sisyphus is a common stonyS-type asteroid .[ 1]
In 1985, this object was detected withradar from theArecibo Observatory at a distance of 0.25 AU. The measuredradar cross-section was 8 square kilometers.[ 6] [ a] 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,[ 7] Brian Warner added additional weight to this conclusion, giving± 0.05orbital period , longer than the 25 hours previously reported by Stephens.[ 8]
Diameter and albedo [ edit ] With a measured mean diameter in the range of 5.7–8.9 kilometers, it is the largest of theEarth-crossing asteroids , comparable in size to theChicxulub object whose impact contributed to theextinction of the dinosaurs.[ 23] 1036 Ganymed (32 km),3552 Don Quixote (19 km),433 Eros (17 km), and4954 Eric (10.8 km).
Thisminor planet is named afterSisyphus fromGreek 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 theunderworld , only to have it roll down again each time he neared the top.[ 2] naming citation was published by theMinor Planet Center on 20 December 1974 (M.P.C. 3758[ 24]
^a b c Benner (1985), gives a diameter of 8 kilometer. Summary figures listed atLCDB ^a b Pravec (1998web), gives a rotation period of 2.4 hours. Summary figures listed atLCDB ^a b c d e f g h "JPL Small-Body Database Browser: 1866 Sisyphus (1972 XA)" (2016-08-15 last obs.).Jet Propulsion Laboratory .Archived from the original on 20 December 2016. Retrieved9 June 2017 .^a b Schmadel, Lutz D. (2007). "(1866) Sisyphus".Dictionary of Minor Planet Names – (1866) Sisyphus .Springer Berlin Heidelberg . p. 150.doi :10.1007/978-3-540-29925-7_1867 .ISBN 978-3-540-00238-3 ^a b "1866 Sisyphus (1972 XA)" .Minor Planet Center .Archived from the original on 21 December 2016. Retrieved12 December 2016 .^ "Sisyphean" Oxford English Dictionary (Subscription orparticipating institution membership required.) ^ "Sisyphian" Oxford English Dictionary (Subscription orparticipating institution membership required.) ^a b c Ostro, S. J.; Campbell, D. B.; Chandler, J. F.; Shapiro, I. I.; Hine, A. A.; Velez, R.; et al. (October 1991)."Asteroid radar astrometry" .Astronomical Journal .102 : 1490–1502.ResearchsupportedbyNASA.Bibcode :1991AJ....102.1490O .doi :10.1086/115975 .ISSN 0004-6256 .Archived from the original on 16 December 2017. Retrieved12 December 2016 . ^a b c Stephens, Robert D.; French, Linda, M.; Warner, Brian D.; Wasserman, Lawrence H. (October 2011)."The Curse of Sisyphus" .The Minor Planet Bulletin .38 (4):212– 213.Bibcode :2011MPBu...38..212S .ISSN 1052-8091 .Archived from the original on 29 January 2020. Retrieved12 December 2016 . {{cite journal }}: CS1 maint: multiple names: authors list (link )^a b c d Warner, Brian D. (October 2016)."Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 April-July" .The Minor Planet Bulletin .43 (4):311– 319.Bibcode :2016MPBu...43..311W .ISSN 1052-8091 .Archived from the original on 29 January 2020. Retrieved12 December 2016 . ^a b c Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011)."Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey" .Publications of the Astronomical Society of Japan .63 (5):1117– 1138.Bibcode :2011PASJ...63.1117U .doi :10.1093/pasj/63.5.1117 online ,AcuA catalog p. 153 Archived 25 March 2019 at theWayback Machine )^a b c Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results".The Astrophysical Journal .741 (2): 25.arXiv :1109.6407 Bibcode :2011ApJ...741...90M .doi :10.1088/0004-637X/741/2/90 . ^a b c Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012)."Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations" .Icarus .221 (1):365– 387.Bibcode :2012Icar..221..365P .doi :10.1016/j.icarus.2012.07.026 .Archived from the original on 8 June 2020. Retrieved12 December 2016 . ^a b "LCDB Data for (1866) Sisyphus" . Asteroid Lightcurve Database (LCDB).Archived from the original on 20 August 2020. Retrieved12 December 2016 .^a b c Delbó, Marco; Harris, Alan W.; Binzel, Richard P.; Pravec, Petr; Davies, John K. (November 2003)."Keck observations of near-Earth asteroids in the thermal infrared" .Icarus .166 (1):116– 130.Bibcode :2003Icar..166..116D .doi :10.1016/j.icarus.2003.07.002 . Retrieved12 December 2016 . ^a b Delbo, Marco; Walsh, Kevin; Mueller, Michael; Harris, Alan W.;Howell, Ellen S. (March 2011)."The cool surfaces of binary near-Earth asteroids" .Icarus .212 (1):138– 148.Bibcode :2011Icar..212..138D .doi :10.1016/j.icarus.2010.12.011 . Retrieved12 December 2016 . ^ Schober, H. J.; Erikson, A.; Hahn, G.; Lagerkvist, C. I.; Oja, T. (November 1993)."Physical Studies of Asteroids. Part XXVI. Rotation and Photoelectric Photometry of Asteroids 323, 350, 582, 1021 and 1866" .Astronomy and Astrophysics Supplement .101 (3): 507.Bibcode :1993A&AS..101..499S . Retrieved12 December 2016 . ^ Behrend, Raoul."Asteroids and comets rotation curves – (1866) Sisyphus" .Geneva Observatory .Archived from the original on 3 August 2003. Retrieved12 December 2016 . ^ Szabó, Gy. M.; Csák, B.; Sárneczky, K.; Kiss, L. L. (August 2001)."Photometric observations of 9 Near-Earth Objects" .Astronomy and Astrophysics .375 :285– 292.arXiv :astro-ph/0106017 Bibcode :2001A&A...375..285S .doi :10.1051/0004-6361:20010813 . Retrieved12 December 2016 . ^ Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Wright, E.; Cutri, R. M.; et al. (August 2011)."Thermal Model Calibration for Minor Planets Observed with Wide-field Infrared Survey Explorer/NEOWISE" .The Astrophysical Journal .736 (2): 9.Bibcode :2011ApJ...736..100M .CiteSeerX 10.1.1.472.4936 doi :10.1088/0004-637X/736/2/100 . Retrieved12 December 2016 . ^ Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014)."Physical characterization of Warm Spitzer-observed near-Earth objects" .Icarus .228 :217– 246.arXiv :1310.2000 Bibcode :2014Icar..228..217T .doi :10.1016/j.icarus.2013.10.004 .hdl :2060/20140012047 .Archived from the original on 16 June 2020. Retrieved12 December 2016 . ^ NASA.gov ^ "JPL Close-Approach Data: 1866 Sisyphus (1972 XA)" (last observation: 2013-07-26).Archived from the original on 21 August 2020. Retrieved30 October 2013 .^ "(1866) Sisyphus Ephemerides for November 2071" .NEODyS (Near Earth Objects – Dynamic Site). Retrieved30 October 2013 .^ "JPL Small-Body Database Search Engine: asteroids and NEOs and H < 13 (mag)" . JPL Solar System Dynamics. Retrieved31 October 2013 .^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs".Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) . Springer Berlin Heidelberg. p. 221.Bibcode :2009dmpn.book.....S .doi :10.1007/978-3-642-01965-4 .ISBN 978-3-642-01964-7
