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

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 775 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5383058285246826 1.6599e-08  
a 1.893432024209148 1.9743e-09 au
q .8741865296620759 3.1445e-08 au
i 41.2035333174262 7.9149e-07 deg
node 63.47452779988983 2.1508e-06 deg
peri 293.074928537243 2.4301e-06 deg
M 253.9728099070293 4.2359e-06 deg
tp 2459676.777190451393
(2022-Apr-07.27719045)
1.1493e-05 TDB
period 951.6406921095139
2.61
1.4884e-06
4.075e-09
d
yr
n .3782940378494991 5.9167e-10 deg/d
Q 2.912677518756221 3.037e-09 au
  Orbit Determination Parameters
   # obs. used (total)      5112  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      24286 days (66.49 yr)  
   first obs. used      1955-01-26  
   last obs. used      2021-07-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35538  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-25 05:48:09  

Additional Information
 Earth MOID = .103702 au 
 Jupiter MOID = 3.25295 au 
 T_jup = 3.513 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.44   n/a E2021B10  
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. 2020-October); 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, B.D.; Wasserman, L. (2011) Minor Planet Bull. 38, 212-213.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2016) Minor Planet Bull. 43, 306-309.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 311-319.]
[Aznar, A.M.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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 0.45113634977806 0.451133021582854 0.451139677978678 33.8145966121644 33.8144219489509 2419745.736836028 0.202154795740647 183.382736589015 5.04243855881627 25.1855358385781 5610386.43266161 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1920-Jun-12 20:58 < 00:01 Earth 0.444885887398643 0.444885254913162 0.444886519903469 24.6626508060798 24.6624079627877 2422488.373403249 0.0755979110481971 151.682473902228 5.31737313849346 78.1659254694955 12818412.6492925 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1933-Jun-15 06:29 < 00:01 Earth 0.442506874492422 0.442506503393951 0.442507245604502 22.2803687684042 22.2800985141158 2427238.769802844 0.0287823787049298 129.630972645664 5.55930543863688 -82.1666350277756 12530805.9640752 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1946-Jun-16 00:15 < 00:01 Earth 0.49153655785752 0.491535714676922 0.491537401045913 20.6950272384305 20.6947653035838 2431987.510459024 0.0112387171443486 107.113871488411 5.67470927166587 -67.0767791964835 12682230.7291326 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1946-Nov-12 05:36 < 00:01 Earth 0.350649087641858 0.35064695160019 0.350651223697658 21.6421032649747 21.6417521545683 2432136.733003592 0.0859055766296166 153.940207250726 4.95374649251864 -46.2475802951274 7969442.78318485 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1959-Nov-17 08:31 < 00:01 Earth 0.197423166949288 0.197421737448801 0.19742459646213 23.0737678977352 23.0731829713293 2436889.855033732 0.0758695139730623 105.690081002081 4.33807072060859 -47.640415425631 5184176.32491143 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1972-Nov-21 21:30 < 00:01 Earth 0.102883771919973 0.102883646411809 0.102883897435183 25.1545086939732 25.1534791176955 2441643.395939515 0.0519451471745975 59.9018674054764 4.38935995867505 -85.7167732401554 3537458.83428027 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1985-Nov-27 21:43 < 00:01 Earth 0.183071377412524 0.183070759127771 0.183071995698972 27.828140631637 27.8276176194613 2446397.404962492 0.0409176151830475 41.7286257478773 4.5463519822899 42.6800898458107 4105854.39947068 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
1998-Dec-04 16:31 < 00:01 Earth 0.337946734432858 0.337946298445964 0.337947170419943 31.180091347702 31.1798384828421 2451152.188305477 0.02868868958068 25.2555118301699 4.72098449594438 31.1992081416261 5744801.94104161 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2006-Jun-10 20:04 < 00:01 Earth 0.494839307678984 0.494839082445221 0.494839532912943 26.8141043115543 26.8139035010172 2453897.336192708 0.0169043466086437 20.7230662101838 4.87319784113751 59.8416456600618 13649548.4046047 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2019-Jun-14 06:02 < 00:01 Earth 0.450374102958433 0.450373971111874 0.450374234805145 23.9983372767267 23.9980907522619 2458648.751715421 0.0155912356257907 23.7447587832967 5.46809276754438 80.9102278731516 12807043.0038797 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2032-Jun-15 03:21 < 00:01 Earth 0.45846341556033 0.458463230284237 0.458463600837074 21.8763557549372 21.8760900893323 2463398.639437164 0.0122641060792225 36.4759176403793 5.79439604903109 -78.4731481282094 12360665.3164057 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2032-Nov-08 20:12 < 00:01 Earth 0.469431940449605 0.469431206793293 0.469432674106691 21.1484074577051 21.1481390686462 2463545.341934254 0.0244472522290315 47.5763674341022 5.89776204439424 -40.1102458529802 8024002.06880977 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2045-Nov-13 05:48 < 00:01 Earth 0.303696118452299 0.303695092026457 0.303697144881559 22.0426778341706 22.042279807033 2468297.741815146 0.0448516161797737 72.238379061707 4.43817269385457 -44.9916119649666 7548487.9643136 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2058-Nov-18 16:40 < 00:01 Earth 0.153292862839487 0.153291833581865 0.153293892108828 23.7671987746911 23.7664674350651 2473051.194638561 0.0665165054101665 84.4472003827924 4.23423631851135 -52.6650328432921 4410156.57703067 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2071-Nov-24 07:51 < 00:01 Earth 0.115812394242684 0.115811690894438 0.115813097619752 26.0224053454617 26.0215212131614 2477804.827171041 0.0891112109644346 98.2938975423652 4.38346863046919 69.2447320860566 3722584.95637633 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2084-Nov-29 15:54 < 00:01 Earth 0.240126279820466 0.240124285020768 0.240128274629214 28.9689722351588 28.9685891966412 2482559.162686265 0.123096779782504 123.703252014376 4.59004432912913 36.5037654016925 4638147.7653649 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2097-Dec-06 16:54 < 00:01 Earth 0.405200869412127 0.405198409975377 0.405203328853 32.5562425248163 32.5560405444942 2487314.203950557 0.149483594421603 138.562673375622 4.84558693842217 27.7545918819881 5758556.81507107 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2105-Jun-12 18:59 < 00:01 Earth 0.484562333410352 0.484561468259664 0.484563198573298 25.8272644008611 25.8270514957506 2490058.291301804 0.0803237416475449 129.716534617154 5.27303960250942 70.7093908907894 13515846.8680296 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2118-Jun-15 18:08 < 00:01 Earth 0.456948510531001 0.456948397943827 0.456948623118253 23.1616563605848 23.1614046057399 2494809.255555924 0.0497277926647959 147.32169325287 5.60396252660175 89.867745547592 12935590.5275035 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2131-Jun-17 00:30 < 00:01 Earth 0.481826007890848 0.481825079005272 0.481826936796033 21.3354313686824 21.3351721756467 2499558.521126633 0.0130236633604448 161.307413591614 5.80339029766657 -73.4362519259043 12691783.953059 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2131-Nov-12 06:41 < 00:01 Earth 0.39234236209774 0.392339042844033 0.392345681379102 21.5118987854737 21.5115830876447 2499706.778410624 0.117998425708798 233.278344226589 5.13832861649756 -44.8168057765917 8370733.80625487 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2144-Nov-16 04:47 < 00:01 Earth 0.229993203077451 0.22998998571132 0.229996420494687 22.7669115021018 22.7664026423646 2504459.699580503 0.156932021676635 234.499589152515 4.28919486830727 -46.8393433617563 6048241.25613564 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2157-Nov-21 17:04 < 00:01 Earth 0.11455551161695 0.114554333991383 0.114556689399886 24.7413796392521 24.740439524851 2509213.211413324 0.181875430827108 220.271277263133 4.300928979819 -74.5764326489768 3899405.32294047 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2170-Nov-27 11:23 < 00:01 Earth 0.164489519831039 0.164486099059369 0.164492940693471 27.24775392074 27.2471594258126 2513966.974582945 0.239540389098921 257.393121411515 4.46297346733377 48.501580173985 4135976.27440019 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2183-Dec-04 06:30 < 00:01 Earth 0.319807902724311 0.31980316510003 0.319812640374951 30.573353304303 30.5730807945651 2518721.770778174 0.282336701067846 277.097014184873 4.68015892063077 31.5122007974655 5294884.12375556 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
2196-Dec-10 09:55 < 00:01 Earth 0.488626638643955 0.488621505544536 0.488631771755816 34.3162084187389 34.316049513972 2523476.912895370 0.312241180555787 283.956150836708 4.94719366821905 25.6575722000516 6297290.66433352 T 775 CATAB v2.0g-lin.ifort 2021-Jul-25 05:48:30 2021-Jul-25 05:48
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