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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 328 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990872004819 4.0504e-08  
a 1.893913502578685 2.543e-09 AU
q .8744215929039113 7.6834e-08 AU
i 41.18736753367406 5.6406e-06 deg
node 63.55627339528894 7.4369e-06 deg
peri 293.0560884627166 7.3467e-06 deg
M 67.67116332467619 6.0535e-06 deg
tp 2456821.546672137156
(2014-Jun-13.04667214)
1.5797e-05 JED
period 952.0037023972958
2.61
1.9174e-06
5.25e-09
d
yr
n .3781497898521435 7.6161e-10 deg/d
Q 2.913405412253458 3.9118e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2377  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      21870 days (59.88 yr)  
   first obs. used      1955-01-26  
   last obs. used      2014-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46677  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Dec-17 05:14:39  

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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 0.451135822308107 0.451131894384146 0.451139750232185 33.8145868915964 33.8144122281285 2419745.736814879 0.0687100518378658 194.077056181759 11.4856347111339 9.49936337146453 976408.16378198 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1920-Jun-12 20:58 < 00:01 Earth 0.444885881652804 0.444885052458328 0.444886710872496 24.662658021314 24.6624151780898 2422488.373389694 0.0322779937166748 166.525183513137 12.7075951464575 75.3587010356934 4618230.47672702 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1933-Jun-15 06:29 < 00:01 Earth 0.442506779771402 0.442506309127614 0.442507250431048 22.2803733695001 22.2801031152097 2427238.769794828 0.0182679928167449 135.152295121705 11.9913976609452 -84.8860689944319 4917384.57592493 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1946-Jun-16 00:15 < 00:01 Earth 0.491536442355206 0.491535438507122 0.491537446213849 20.6950302737617 20.6947683388919 2431987.510453312 0.0145466499627802 106.136274823439 11.3915670147054 -68.8607743729898 5305065.40612845 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1946-Nov-12 05:36 < 00:01 Earth 0.350649411702271 0.350646957552003 0.350651865854262 21.6421028700174 21.6417517599291 2432136.732992646 0.0311933784009454 110.143190893202 13.0598006255865 -14.12583072137 962980.339710338 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1959-Nov-17 08:31 < 00:01 Earth 0.197423387496597 0.197421770586648 0.19742500441098 23.0737668883569 23.0731819625789 2436889.855024322 0.0299808538697135 81.8087045566708 12.5725981306535 -29.6632849240256 1083847.15018809 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1972-Nov-21 21:30 < 00:01 Earth 0.10288375911522 0.102883466379919 0.102884051852042 25.1545080276518 25.1534784512188 2441643.395932802 0.0210309443759387 49.5253543308405 12.2337458750479 -84.4281259997884 1144689.26168041 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1985-Nov-27 21:43 < 00:01 Earth 0.183071217193928 0.183070595810216 0.183071838578296 27.8281397576212 27.8276167449714 2446397.404956018 0.0156837116803342 34.3267137953269 11.9095971439739 34.0176402975455 1342382.1697988 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
1998-Dec-04 16:31 < 00:01 Earth 0.33794657480952 0.337946097086319 0.337947052532734 31.1800904480024 31.1798375830158 2451152.188300171 0.0115650268557698 23.8187057575087 11.5770891028522 18.1760404191936 2291275.32299181 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2006-Jun-10 20:04 < 00:01 Earth 0.494839227862157 0.494838807776907 0.494839647947595 26.8141058979663 26.8139050874087 2453897.336185338 0.0110506182594624 32.0819312918445 13.2944778899095 59.0566383191597 4543700.4807025 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2019-Jun-14 06:02 < 00:01 Earth 0.450374026734164 0.450373720069855 0.450374333399067 23.9983383029294 23.9980917784334 2458648.751709234 0.0126040284555154 39.5336261135825 12.8065077631094 79.8756869038617 4704763.98671704 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2032-Jun-15 03:21 < 00:01 Earth 0.458463371528638 0.45846300221067 0.458463740847795 21.8763565202454 21.8760908546243 2463398.639432262 0.0134394219674953 52.5762092222393 12.2048469950004 -80.2175041443072 4937973.16772449 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2032-Nov-08 20:12 < 00:01 Earth 0.469432011850363 0.469430772571896 0.469433251129068 21.1484088346712 21.1481404456707 2463545.341930447 0.013510407470919 55.147251754816 13.3146837460796 -12.4700824739899 1491406.76611655 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2045-Nov-13 05:48 < 00:01 Earth 0.303696170912822 0.303694563153881 0.303697778673036 22.0426792026848 22.0422811756407 2468297.741812589 0.022343241752789 74.2221203114318 12.7719747726598 -19.2937164493771 1168351.99367019 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2058-Nov-18 16:40 < 00:01 Earth 0.153292875753955 0.153291343453628 0.153294408066947 23.7672002977695 23.7664689582521 2473051.194636810 0.0329387383643734 92.3872257861004 12.3606210310702 -43.0414643709319 1157733.03492301 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2071-Nov-24 07:51 < 00:01 Earth 0.115812357732547 0.115811286604248 0.115813428900513 26.02240718864 26.0215230561238 2477804.827170122 0.0423632865159688 113.46312849658 12.0270530378474 64.4447967083644 1195706.22877567 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2084-Nov-29 15:54 < 00:01 Earth 0.240126265126738 0.240123415120774 0.240129115138594 28.9689745436727 28.9685915051623 2482559.162686643 0.0541982065725091 148.016721618834 11.7431554159292 23.9908053805538 1178616.45984173 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2097-Dec-06 16:54 < 00:01 Earth 0.405200888677251 0.405197435349679 0.405204342005381 32.5562455382601 32.5560435579663 2487314.203951865 0.059190511879056 171.058711613446 11.4360619695778 11.9975621719836 1092286.15714205 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2105-Jun-12 18:59 < 00:01 Earth 0.484562195973855 0.484560999097422 0.484563392872594 25.8272629670586 25.8270500618759 2490058.291297477 0.034580166431196 165.740850326221 13.1335741138554 68.7442447252495 4724851.22968545 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2118-Jun-15 18:08 < 00:01 Earth 0.456948440493989 0.456948198520255 0.456948682459999 23.1616556769024 23.1614039220115 2494809.255550115 0.0253152347043151 178.014713352649 12.510179074867 87.6815635858855 4919510.83621818 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2131-Jun-17 00:30 < 00:01 Earth 0.481826007439236 0.481824720458323 0.481827294454098 21.335431284206 21.3351720911691 2499558.521120209 0.0141451225853355 184.153044500349 11.9726819521226 -75.0024037491255 5154887.34658467 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2131-Nov-12 06:41 < 00:01 Earth 0.39234230406169 0.392337769454465 0.392346838673987 21.5119006981873 21.5115850003398 2499706.778409683 0.0474947091157814 203.819712955687 13.0275447783019 -14.1859728464028 1010785.91169992 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2144-Nov-16 04:47 < 00:01 Earth 0.229993141275658 0.229988782236369 0.2299975003394 22.766913954086 22.766405094267 2504459.699580686 0.0697549649590622 215.822709587318 12.4907918656909 -27.327332032082 1142400.41693882 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2157-Nov-21 17:04 < 00:01 Earth 0.114555473809634 0.114553891370871 0.11455705643883 24.7413822395505 24.7404421249382 2509213.211413400 0.0823528401446712 225.641394888762 12.1007061595214 -72.2178228584899 1229288.68067703 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2170-Nov-27 11:23 < 00:01 Earth 0.164489518143972 0.164484907512491 0.164494128864239 27.2477565587212 27.2471620638454 2513966.974582255 0.104639994027447 281.606953255118 11.8171802764306 39.8004003724244 1234789.64034496 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2183-Dec-04 06:30 < 00:01 Earth 0.319807882957055 0.319801538434142 0.319814227488992 30.5733555323288 30.573083022594 2518721.770777526 0.113720167007788 318.826850124849 11.5267754434563 17.3373295788356 1169295.0597793 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
2196-Dec-10 09:55 < 00:01 Earth 0.488626592640865 0.488619743939603 0.488633441342512 34.316210036839 34.3160511320647 2523476.912892710 0.113031550294475 338.976855933338 11.2494293843063 9.41196148447076 1030161.34219882 T 328 CATAB v2.0c-linF95 2014-Dec-17 05:14:52 2014-Dec-17 05:15
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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