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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 711 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5380833047510095 3.2671e-08  
a 1.893699209979034 2.2333e-09 au
q .8747312808691394 6.1906e-08 au
i 41.19929069361108 4.3803e-06 deg
node 63.49079969112047 6.1651e-06 deg
peri 293.0630043751772 6.3148e-06 deg
M 104.1846730638126 5.5538e-06 deg
tp 2458725.035107721487
(2019-Aug-29.53510772)
1.4363e-05 TDB
period 951.8421309392122
2.61
1.6838e-06
4.61e-09
d
yr
n .3782139792916887 6.6906e-10 deg/d
Q 2.912667139088929 3.435e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4562  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      23889 days (65.40 yr)  
   first obs. used      1955-01-26  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:37:53  

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 0.451136471218439 0.451132852431514 0.451140090011723 33.8146040465702 33.8144293834421 2419745.736846107 0.221104857156414 199.36429139248 13.0765523612542 25.2150904845328 2166887.22661369 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1920-Jun-12 20:58 < 00:01 Earth 0.444885844156658 0.444885105898447 0.444886582436113 24.6626516615866 24.6624088182793 2422488.373399503 0.0854433939282608 166.37242204852 12.0678198460965 77.9012249554329 5343998.60388164 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1933-Jun-15 06:29 < 00:01 Earth 0.442506903762356 0.442506464788064 0.442507342749327 22.2803714472764 22.2801011930384 2427238.769796972 0.0397949834856992 142.167031087215 11.8367965098664 -82.5315831266067 5556209.30681802 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1946-Jun-16 00:15 < 00:01 Earth 0.491536617092647 0.491535693005099 0.491537541189191 20.6950310235001 20.6947690887328 2431987.510452730 0.0279136520937913 117.59509760575 11.5391712895041 -67.5908245263342 5913955.70659131 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1946-Nov-12 05:36 < 00:01 Earth 0.35064903488548 0.350646733852432 0.350651335934892 21.6421088988065 21.6417577884387 2432136.733008952 0.0956402757763611 166.244624329992 13.5423287108674 -46.5537786274328 2933450.32130421 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1959-Nov-17 08:31 < 00:01 Earth 0.197423153156584 0.197421622317839 0.197424684009199 23.0737732423362 23.0731883160251 2436889.855038125 0.0832905880366137 113.09720561581 11.4755938802288 -47.8739215639826 1977597.5014911 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1972-Nov-21 21:30 < 00:01 Earth 0.102883755703036 0.102883524874317 0.102883986533959 25.1545136617933 25.1534840855569 2441643.395943888 0.0573741574238652 63.1487807877855 10.6347014700623 -85.9424599272224 1458558.86470236 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1985-Nov-27 21:43 < 00:01 Earth 0.183071336381399 0.183070679485293 0.183071993279056 27.8281448635036 27.8276218512902 2446397.404965709 0.0450247042304899 43.2466476001494 10.8492435463359 42.4135346799216 1753896.93535873 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
1998-Dec-04 16:31 < 00:01 Earth 0.33794666790347 0.337946181770053 0.33794715403704 31.1800946850088 31.1798418201263 2451152.188308048 0.033893205425149 27.3446070980546 11.9910016913999 30.9866707602655 2641209.45253243 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2006-Jun-10 20:04 < 00:01 Earth 0.494839281250529 0.494838929077865 0.494839633423389 26.8141076791358 26.8139068686132 2453897.336185787 0.0297104590775049 28.1261381997544 12.1613887700692 60.0301843622794 5353029.5988482 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2019-Jun-14 06:02 < 00:01 Earth 0.450374097477981 0.450373834557947 0.450374360398117 23.9983415615908 23.998095037167 2458648.751707698 0.0302252341815906 33.6219783613132 12.22583670429 81.3048440654018 5436175.24615943 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2032-Jun-15 03:21 < 00:01 Earth 0.458463413911021 0.458463108077917 0.458463719744802 21.8763604081017 21.8760947425524 2463398.639431205 0.0283641237405907 47.7967504114762 12.1096378320185 -78.4337286279165 5592356.5544675 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2032-Nov-08 20:12 < 00:01 Earth 0.469432037010188 0.469431083357096 0.469432990664615 21.1484123505453 21.1481439616038 2463545.341935772 0.040136083251211 63.7403776955901 17.2046459343419 -43.7514989472312 3004379.72219001 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2045-Nov-13 05:48 < 00:01 Earth 0.303696231161545 0.303694956003904 0.303697506324349 22.0426822035201 22.0422841766092 2468297.741816223 0.0568835784955605 90.0686310025144 12.557684322783 -45.6603883936908 2712396.85577234 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2058-Nov-18 16:40 < 00:01 Earth 0.153292969102318 0.153291721126499 0.153294217094772 23.7672020691964 23.7664707301789 2473051.194637883 0.0800611971905116 102.049192643062 10.9630828871274 -52.8586169020283 1711621.39282121 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2071-Nov-24 07:51 < 00:01 Earth 0.115812311288144 0.115811454200164 0.115813168414603 26.0224077091895 26.0215235763364 2477804.827169902 0.10527019927862 116.679257008861 10.4685422133402 69.1094649409113 1552697.57742941 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2084-Nov-29 15:54 < 00:01 Earth 0.240126117254822 0.24012376939289 0.240128465129025 28.9689737082976 28.9685906695403 2482559.162684201 0.143876013089915 145.264014169455 11.1595149134072 36.4209873315317 1898023.54459468 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2097-Dec-06 16:54 < 00:01 Earth 0.40520068802553 0.405197816340752 0.405203559715835 32.5562430787416 32.5560410983326 2487314.203947902 0.173698441809475 161.598980940516 12.5086317445884 27.6983527836063 2226236.30205058 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2105-Jun-12 18:59 < 00:01 Earth 0.48456234775502 0.484561332144826 0.484563363380887 25.8272698501853 25.827056945126 2490058.291292590 0.0956726964357143 150.449460400957 12.3106001167933 70.8756291534431 5495200.15880904 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2118-Jun-15 18:08 < 00:01 Earth 0.456948506728084 0.456948261844054 0.456948751612113 23.1616622051415 23.161410450358 2494809.255547245 0.0620391917133421 170.033708967544 12.2113481255519 -89.9894920997912 5606137.58908019 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2131-Jun-17 00:30 < 00:01 Earth 0.481825972720836 0.481824880329831 0.481827065136766 21.3354369463899 21.335177753403 2499558.521120119 0.0287498455767328 185.390174228914 12.0467887796911 -73.3114238971504 5782630.11071166 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2131-Nov-12 06:41 < 00:01 Earth 0.392342564280685 0.392338739324222 0.392346389273701 21.5119029889407 21.5115872913362 2499706.778409944 0.136553380962333 268.80090531621 14.3517226934091 -44.8803341460671 2979699.55690017 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2144-Nov-16 04:47 < 00:01 Earth 0.229993390530338 0.229989696665684 0.229997084461955 22.7669146460225 22.7664057867704 2504459.699577885 0.179636638214287 269.035263245614 11.4802716067208 -46.8458888845686 2260402.65951365 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2157-Nov-21 17:04 < 00:01 Earth 0.114555568948022 0.114554211101424 0.114556926996054 24.7413817781761 24.740441664327 2509213.211410084 0.207310423284712 251.741275749544 10.4788700887305 -74.5746721114477 1597336.24674366 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2170-Nov-27 11:23 < 00:01 Earth 0.164489310822684 0.164485410280505 0.164493211482263 27.247754205778 27.2471597101015 2513966.974576646 0.272203137291322 293.248966110727 10.5811905479558 48.4916759036236 1734627.08624222 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2183-Dec-04 06:30 < 00:01 Earth 0.319807611258728 0.319802224673761 0.319812997877636 30.5733518206934 30.573079310694 2518721.770770121 0.320181281490682 314.948563588208 11.7045748326047 31.500154964789 2100722.96195178 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
2196-Dec-10 09:55 < 00:01 Earth 0.488626331716642 0.488620508458414 0.488632154990814 34.3162058611935 34.316046956315 2523476.912885829 0.35343300355009 322.048699943571 13.1451749004686 25.6443796709899 2354323.22680496 T 711 CATAB v2.0f-lin.ifort 2020-Jun-23 15:38:11 2020-Jun-23 15:38
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