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1866 Sisyphus (1972 XA)
Classification: Apollo [NEO]          SPK-ID: 2001866
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 335 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990875525804 4.0183e-08  
a 1.893913502544441 2.5388e-09 AU
q .8744215922212569 7.6218e-08 AU
i 41.18736783492463 5.5559e-06 deg
node 63.55627319348697 7.3965e-06 deg
peri 293.0560887013123 7.3163e-06 deg
M 67.67116326837849 6.0489e-06 deg
tp 2456821.546672290886
(2014-Jun-13.04667229)
1.5784e-05 JED
period 952.0037023714763
2.61
1.9142e-06
5.241e-09
d
yr
n .3781497898623994 7.6036e-10 deg/d
Q 2.913405412867626 3.9054e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2396  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      21926 days (60.03 yr)  
   first obs. used      1955-01-26  
   last obs. used      2015-02-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46571  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-07 05:16:36  

Additional Information
 Earth MOID = .104032 AU 
 T_jup = 3.513 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.4 mag n/a MPO267714  
diameter diameter 8.48 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
rotation period rot_per 2.400 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I. (1993) Astron. Astrophys. Suppl. Ser.; 101, 499-505.]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
[Stephens, R.D.; French, L.M.; Warner, Brian D.; Wasserman, L. (2011) Minor Planet Bul. 38, 212-213.]
geometric albedo albedo 0.15   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1866 Sisyphus (1972 XA)          Discovered 1972-Dec-05 by Wild, P. at Zimmerwald (026)
Reference: DISCOVERY.DBLast Updated: 2013-09-05

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (AU) Minimum Distance (AU) Maximum Distance (AU) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1912-Dec-09 05:41 < 00:01 Earth 0.451135803158912 0.451131881005253 0.451139725312724 33.8145865695291 33.814411906052 2419745.736813860 0.0685105548978212 193.78260017812 11.4332535222004 9.48385721967735 979143.028157009 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1920-Jun-12 20:58 < 00:01 Earth 0.444885887609867 0.444885062425959 0.44488671281916 24.6626583000854 24.6624154568672 2422488.373389425 0.0320825237109257 166.096176816503 12.5917453138091 75.3812207098808 4661183.61227115 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1933-Jun-15 06:29 < 00:01 Earth 0.442506781276346 0.442506311452478 0.442507251114168 22.2803736447963 22.2801033905102 2427238.769794302 0.018051877886834 134.779306501462 11.9051925182331 -84.8650101975183 4952827.87049084 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1946-Jun-16 00:15 < 00:01 Earth 0.491536441138388 0.491535439760331 0.49153744252679 20.6950305711822 20.6947686363155 2431987.510452526 0.0143743785966227 105.814198663677 11.331370423199 -68.8445389456584 5332650.37601484 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1946-Nov-12 05:36 < 00:01 Earth 0.350649422256221 0.350646971795663 0.350651872718507 21.6421029633523 21.6417518532761 2432136.732992152 0.0311360224809322 109.999523538142 12.9111999090037 -14.1780170254732 975136.651060189 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1959-Nov-17 08:31 < 00:01 Earth 0.197423394536154 0.197421780472956 0.197425008603781 23.0737669232147 23.0731819974584 2436889.855023569 0.0298985172343939 81.7144816297206 12.4486124297927 -29.722461318259 1095805.13616455 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1972-Nov-21 21:30 < 00:01 Earth 0.102883757520516 0.102883467391315 0.102884047651387 25.1545081192734 25.1534785428283 2441643.395932682 0.0209407952279953 49.4873406566979 12.1314492948762 -84.5029984643509 1154473.95270076 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1985-Nov-27 21:43 < 00:01 Earth 0.183071216572146 0.183070595219988 0.183071837924868 27.8281399182088 27.8276169055602 2446397.404956223 0.0155997386532298 34.3194110880037 11.8262479683588 33.9657866230986 1348663.60940961 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
1998-Dec-04 16:31 < 00:01 Earth 0.337946576086888 0.337946099033901 0.337947053139952 31.1800906213395 31.1798377563554 2451152.188300353 0.0115035363491543 23.7972024314343 11.5067358792225 18.270846641819 2299895.01788718 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2006-Jun-10 20:04 < 00:01 Earth 0.494839229126388 0.494838811200216 0.494839647052751 26.8141059753763 26.8139051648198 2453897.336184855 0.0109390301281843 32.0077995150707 13.1467739188516 59.0434536608196 4591905.86598758 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2019-Jun-14 06:02 < 00:01 Earth 0.45037402962544 0.450373724943199 0.450374334307687 23.99833850577 23.9980919812777 2458648.751708332 0.0124869340075338 39.5069954117561 12.6880769052539 79.8153300737937 4747742.21496466 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2032-Jun-15 03:21 < 00:01 Earth 0.45846337491977 0.458463007538487 0.458463742302966 21.8763567736206 21.8760911080046 2463398.639431241 0.0132826217925504 52.5527236215524 12.1193798779939 -80.2665413762096 4973436.33287533 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2032-Nov-08 20:12 < 00:01 Earth 0.469432010782186 0.469430774960436 0.469433246604114 21.1484090003909 21.1481406113919 2463545.341930029 0.0134727787591602 54.9711084556844 13.1605665695062 -12.2975295087841 1493138.14812463 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2045-Nov-13 05:48 < 00:01 Earth 0.303696168980217 0.3036945649555 0.30369777300626 22.0426793580949 22.0422813310511 2468297.741812130 0.0223127142234609 74.0128803703534 12.6345877207399 -19.1891862425712 1174411.03302795 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2058-Nov-18 16:40 < 00:01 Earth 0.153292873578831 0.153291343824529 0.153294403345708 23.7672004426998 23.7664691031765 2473051.194636370 0.032909085085371 92.1455151701737 12.2441070065162 -42.9713397818106 1167113.75891591 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2071-Nov-24 07:51 < 00:01 Earth 0.115812356983244 0.115811290697893 0.115813423308113 26.022407373191 26.0215232406753 2477804.827170214 0.0423273084708015 113.172592469173 11.9320624062941 64.4938661613797 1205695.28825208 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2084-Nov-29 15:54 < 00:01 Earth 0.240126267650912 0.240123425178747 0.24012911012896 28.9689747296219 28.968591691118 2482559.162686418 0.0541490165125014 147.662265878998 11.6671198988946 24.0225275855222 1187570.43383026 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2097-Dec-06 16:54 < 00:01 Earth 0.405200892624852 0.405197447441922 0.405204337808381 32.5562457712947 32.5560437910044 2487314.203952308 0.0591374336246451 170.670415203649 11.3772260987102 12.0209858275048 1099564.81571358 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2105-Jun-12 18:59 < 00:01 Earth 0.484562196759278 0.484561000421479 0.48456339311947 25.8272628537778 25.8270499485945 2490058.291297827 0.0345648223183488 165.535472376666 13.0082017405488 68.7197305397098 4769562.77533302 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2118-Jun-15 18:08 < 00:01 Earth 0.456948443523384 0.456948203512592 0.456948683529075 23.1616557461087 23.1614039912202 2494809.255549823 0.0252850003456213 177.793627098994 12.4142306673288 87.6632673616503 4957469.00679634 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2131-Jun-17 00:30 < 00:01 Earth 0.481826010065591 0.481824725761027 0.481827294404034 21.3354313163063 21.3351721232712 2499558.521120337 0.0139885671873654 183.924712816346 11.9039308483826 -75.0155837700112 5184970.31155908 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2131-Nov-12 06:41 < 00:01 Earth 0.392342305317055 0.392337779866221 0.392346830772892 21.5119008596623 21.5115851618181 2499706.778409576 0.0474031341558617 203.382874768418 12.8724380003556 -14.1496576541594 1019962.49050674 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2144-Nov-16 04:47 < 00:01 Earth 0.22999314610244 0.229988795108721 0.229997497120469 22.7669140448767 22.7664051850704 2504459.699580269 0.0696508941144393 215.372712996354 12.3592235559775 -27.2976412400061 1153300.5296413 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2157-Nov-21 17:04 < 00:01 Earth 0.114555476286699 0.114553895398295 0.114557057364824 24.7413821899943 24.7404420754004 2509213.211412668 0.0822477321447051 225.179793289016 11.9923601162394 -72.1933048515715 1240222.40291076 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2170-Nov-27 11:23 < 00:01 Earth 0.164489497578544 0.164484897626418 0.164494097619162 27.247756281524 27.2471617865678 2513966.974581751 0.104501985203472 281.027277094581 11.7296299509716 39.8176803504395 1244437.67284662 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2183-Dec-04 06:30 < 00:01 Earth 0.319807847082446 0.319801515892986 0.319814178280936 30.5733548668469 30.5730823570756 2518721.770775428 0.113572436681671 318.179986845219 11.4586452127807 17.350536042408 1177043.05522894 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
2196-Dec-10 09:55 < 00:01 Earth 0.488626545696599 0.488619710938382 0.488633380455185 34.3162090818271 34.3160501770331 2523476.912890994 0.11288750534856 338.29807806176 11.196982427605 9.42287060713367 1036022.73249118 T 335 CATAB v2.0c-linF95 2015-Feb-07 05:16:52 2015-Feb-07 05:17
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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