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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 706 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5380833051830093 3.2785e-08  
a 1.893699209977175 2.2348e-09 au
q .8747312800502034 6.2125e-08 au
i 41.1992907875855 4.435e-06 deg
node 63.49079966029159 6.1759e-06 deg
peri 293.0630044375453 6.3272e-06 deg
M 104.18467306904 5.5544e-06 deg
tp 2458725.035107708072
(2019-Aug-29.53510771)
1.4365e-05 TDB
period 951.8421309378109
2.61
1.6849e-06
4.613e-09
d
yr
n .3782139792922454 6.695e-10 deg/d
Q 2.912667139904148 3.4373e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4525  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      23863 days (65.33 yr)  
   first obs. used      1955-01-26  
   last obs. used      2020-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35673  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-28 06:50:18  

Additional Information
 Earth MOID = .104589 au 
 Jupiter MOID = 3.25074 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 12.4   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. 2019-August); 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 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 Macias, A.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).]
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 0.451136473913114 0.451132853217422 0.45114009461519 33.814604179716 33.8144295165897 2419745.736846736 0.221321798571746 199.488730922467 13.1604542888836 25.2275884619323 2154107.59589845 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1920-Jun-12 20:58 < 00:01 Earth 0.444885843663565 0.444885104471084 0.444886582877314 24.6626517840052 24.6624089406988 2422488.373398738 0.0856002118758593 166.542216425614 12.1071646021548 77.901024237695 5321920.40810798 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1933-Jun-15 06:29 < 00:01 Earth 0.442506904608716 0.442506464991773 0.442507344238387 22.280371239892 22.280100985652 2427238.769797928 0.0399814783210627 142.321151753946 11.8631820167677 -82.5310462216147 5537860.9018473 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1946-Jun-16 00:15 < 00:01 Earth 0.491536618361035 0.491535693081901 0.491537543649165 20.6950311545385 20.6947692197736 2431987.510452149 0.0281030199610653 117.73440472428 11.5553718577925 -67.5884816711903 5898658.98169996 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1946-Nov-12 05:36 < 00:01 Earth 0.350649034427753 0.350646732036555 0.350651336835315 21.6421089432542 21.6417578328867 2432136.733008648 0.0956800693371269 166.298622645744 13.6163374065498 -46.5412545264013 2917228.29800889 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1959-Nov-17 08:31 < 00:01 Earth 0.197423153809305 0.197421621881889 0.197424685750592 23.0737733099636 23.073188383656 2436889.855038529 0.083351818840215 113.137319200902 11.5383778092395 -47.8584038863707 1966683.38626113 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1972-Nov-21 21:30 < 00:01 Earth 0.10288375480719 0.10288352280399 0.102883986812607 25.1545136766964 25.1534841004516 2441643.395943890 0.057442334761141 63.1698453765942 10.6865039256177 -85.9174628568185 1451494.74402398 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1985-Nov-27 21:43 < 00:01 Earth 0.183071332464397 0.183070675564371 0.183071989365973 27.828144840979 27.827621828754 2446397.404965523 0.0450937847865148 43.2553991219954 10.9033501845028 42.4442415461891 1746595.61195748 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
1998-Dec-04 16:31 < 00:01 Earth 0.337946664994092 0.337946178756465 0.337947151231873 31.1800946867199 31.1798418218352 2451152.188308148 0.033955491910032 27.3467993085024 12.0616818207769 31.0175617217476 2632109.16743333 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2006-Jun-10 20:04 < 00:01 Earth 0.49483928133499 0.49483892853813 0.494839634132047 26.814107660696 26.8139068501733 2453897.336185982 0.0298914358123331 28.1642280068178 12.2128847340585 60.0695479894662 5329565.65994048 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2019-Jun-14 06:02 < 00:01 Earth 0.450374097771541 0.45037383426722 0.450374361275991 23.9983414320939 23.9980949076689 2458648.751708433 0.0304145058164211 33.6308100787038 12.2611622617829 81.3232369138116 5415887.0623233 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2032-Jun-15 03:21 < 00:01 Earth 0.458463414398791 0.458463108160235 0.458463720637998 21.8763605138626 21.8760948483148 2463398.639430814 0.0285675177294703 47.7980712511929 12.1316105037801 -78.4268572646051 5576195.50119672 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2032-Nov-08 20:12 < 00:01 Earth 0.469432038461208 0.469431083897677 0.4694329930261 21.1484124067686 21.1481440178286 2463545.341935888 0.0402205177277135 63.8984370516093 17.2866017270068 -43.8660391419782 2995733.49507863 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2045-Nov-13 05:48 < 00:01 Earth 0.303696232736413 0.303694956576588 0.303697508901435 22.0426822978632 22.042284270956 2468297.741817192 0.0569378887117914 90.2026162614974 12.6253868750912 -45.7057403508393 2700283.11985716 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2058-Nov-18 16:40 < 00:01 Earth 0.153292971097272 0.153291722492552 0.153294219718662 23.7672020764225 23.7664707374147 2473051.194637733 0.0801055168152672 102.158167084744 11.0216257881119 -52.8876234815656 1703338.2104193 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2071-Nov-24 07:51 < 00:01 Earth 0.115812308064732 0.115811449198234 0.115813166969748 26.0224076709429 26.0215235380639 2477804.827169656 0.105319447604114 116.787311538758 10.5196969574926 69.0875821211098 1544915.36454369 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2084-Nov-29 15:54 < 00:01 Earth 0.240126109382518 0.240123759035101 0.240128459742221 28.9689736001469 28.9685905613755 2482559.162683881 0.143940245071842 145.385041620346 11.2211954956214 36.4045084509425 1886816.74591088 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2097-Dec-06 16:54 < 00:01 Earth 0.405200676367887 0.40519780201938 0.405203550721921 32.5562428707048 32.5560408902886 2487314.203947431 0.173772150663423 161.725621246494 12.5900038296111 27.6835719054397 2210854.31916484 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2105-Jun-12 18:59 < 00:01 Earth 0.484562351885313 0.484561335816418 0.484563367969882 25.8272701258035 25.8270572207483 2490058.291292107 0.0957583283572017 150.509787327924 12.3524280722221 70.8779009039732 5472099.31984844 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2118-Jun-15 18:08 < 00:01 Earth 0.456948507239135 0.456948261789173 0.456948752689097 23.1616626271172 23.1614108723386 2494809.255546204 0.062146023793912 170.104500785331 12.2395602954457 -89.9884156558775 5587505.58728878 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2131-Jun-17 00:30 < 00:01 Earth 0.48182596729604 0.48182487437891 0.48182706023812 21.3354372654022 21.3351780724163 2499558.521119578 0.0289447159439793 185.469335253512 12.0640836897469 -73.3112552685428 5768026.92400332 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2131-Nov-12 06:41 < 00:01 Earth 0.392342587150701 0.39233875936727 0.392346414970798 21.5119029433949 21.5115872458081 2499706.778409700 0.13668388498574 269.061921326862 14.4305273416349 -44.8944791010601 2964064.86501289 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2144-Nov-16 04:47 < 00:01 Earth 0.229993414239356 0.229989717911789 0.229997110634017 22.7669144432121 22.7664055840079 2504459.699577173 0.179758493361712 269.263941577924 11.5428955033917 -46.8562748549386 2248734.89669767 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2157-Nov-21 17:04 < 00:01 Earth 0.114555577362579 0.114554219130953 0.114556935795912 24.741381390801 24.7404412770062 2509213.211408741 0.207427005878283 251.934259254883 10.5313567836998 -74.5840203382258 1589487.08695027 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2170-Nov-27 11:23 < 00:01 Earth 0.164489280297509 0.164485376230316 0.164493184482244 27.2477535874614 27.2471590916611 2513966.974575527 0.27235510460272 293.468308647903 10.6350571898586 48.4841270845904 1725552.08705118 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2183-Dec-04 06:30 < 00:01 Earth 0.319807567862532 0.319802176920946 0.319812958838095 30.5733509284489 30.5730784184046 2518721.770768172 0.320354950113543 315.178782436923 11.7758776826112 31.4931304657799 2087420.28544744 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
2196-Dec-10 09:55 < 00:01 Earth 0.488626283056403 0.488620455235374 0.488632110893375 34.3162047778397 34.3160458729403 2523476.912883616 0.353620268524415 322.281033135022 13.2365930638151 25.6372414188545 2337340.60167887 T 706 CATAB v2.0f-lin.ifort 2020-May-28 06:50:36 2020-May-28 06:50
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