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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 366 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990802530411 3.9217e-08  
a 1.893913502918679 2.5142e-09 AU
q .874421606218739 7.4363e-08 AU
i 41.18736974225077 5.1663e-06 deg
node 63.5562720742673 7.3224e-06 deg
peri 293.0560888702815 7.199e-06 deg
M 67.6711629222431 5.9785e-06 deg
tp 2456821.546673153184
(2014-Jun-13.04667315)
1.5598e-05 JED
period 952.0037026536506
2.61
1.8957e-06
5.19e-09
d
yr
n .3781497897503156 7.53e-10 deg/d
Q 2.91340539961862 3.8676e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2538  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      22042 days (60.35 yr)  
   first obs. used      1955-01-26  
   last obs. used      2015-06-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46194  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:03:09  

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-July); 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.]
[Behrend, R. (2015) 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: 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 0.45113568550825 0.451131792876606 0.451139578139994 33.8145840995231 33.8144094359877 2419745.736807235 0.0677185416662443 192.286153112534 11.2403150171399 9.4260059263736 989593.479981561 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1920-Jun-12 20:58 < 00:01 Earth 0.444885939082376 0.444885126816601 0.444886751373459 24.6626610809544 24.6624182377917 2422488.373385059 0.0314818295044691 164.206815006659 12.2512571534504 75.4200401766365 4791539.47574514 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1933-Jun-15 06:28 < 00:01 Earth 0.442506785156308 0.442506319884006 0.44250725044371 22.2803757621073 22.2801055078492 2427238.769791143 0.017440275081138 133.189187369532 11.6489931476268 -84.8328885041921 5061499.8734434 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1946-Jun-16 00:15 < 00:01 Earth 0.491536415693942 0.491535425933051 0.491537405464919 20.6950319436302 20.6947700087673 2431987.510451134 0.0138476060921072 104.497334490572 11.1399637420668 -68.8314918628134 5423761.96145752 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1946-Nov-12 05:36 < 00:01 Earth 0.350649492472099 0.350647060091393 0.350651924854535 21.6421033350087 21.6417522250089 2432136.732989139 0.0309296699638599 109.271011962457 12.4183959274836 -14.3480685516609 1017921.21848101 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1959-Nov-17 08:31 < 00:01 Earth 0.197423438990316 0.197421837802879 0.197425040182188 23.0737672098218 23.0731822842046 2436889.855021669 0.0296249774739198 81.2387185625697 12.0197271709903 -29.9255806737201 1139205.31927452 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1972-Nov-21 21:30 < 00:01 Earth 0.10288377137909 0.102883490612689 0.102884052146941 25.1545084714679 25.1534788951759 2441643.395930658 0.0206755846093633 49.2967702147023 11.7696646851086 -84.7740235942435 1190442.35485284 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1985-Nov-27 21:43 < 00:01 Earth 0.18307122303454 0.183070601725732 0.183071844343974 27.8281404191329 27.8276174065121 2446397.404954599 0.0153609917605358 34.2874247450644 11.5296637230086 33.7554149253806 1371153.78595579 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
1998-Dec-04 16:31 < 00:01 Earth 0.337946597571664 0.337946124032024 0.33794707111132 31.1800914048615 31.1798385398997 2451152.188299332 0.0112987104988686 23.6645802858989 11.2541092868539 18.5793387671062 2334758.50769484 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2006-Jun-10 20:04 < 00:01 Earth 0.494839252274074 0.494838839694319 0.494839664853629 26.8141063917477 26.8139055812036 2453897.336183107 0.0105382009833511 31.6963873014938 12.7082690923168 58.7712756098816 4733174.07626454 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2019-Jun-14 06:02 < 00:01 Earth 0.450374050593694 0.450373750832628 0.45037435035509 23.9983387235034 23.9980921990248 2458648.751706745 0.012048201163014 39.2493330167445 12.3505335193509 79.5485366495017 4873463.72344424 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2032-Jun-15 03:21 < 00:01 Earth 0.458463403987613 0.45846304307154 0.458463764905569 21.8763569578608 21.8760912922638 2463398.639429499 0.0127627251843018 52.216765410162 11.8763393762321 -80.4439898305252 5077636.10412 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2032-Nov-08 20:12 < 00:01 Earth 0.469431928120857 0.469430711620904 0.469433144621057 21.1484100938927 21.1481417048603 2463545.341931590 0.0132641180763008 54.0284350560756 12.6646242450675 -11.8178703414778 1508404.88209283 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2045-Nov-13 05:48 < 00:01 Earth 0.30369606868378 0.303694486411327 0.303697650957493 22.0426809966201 22.0422829694744 2468297.741814530 0.0220392314818751 72.8856920178057 12.1728078394645 -18.8732738570816 1198696.71147571 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2058-Nov-18 16:40 < 00:01 Earth 0.153292786747879 0.153291273724573 0.153294299783333 23.7672027614107 23.7664714215445 2473051.194639777 0.0325786603483726 90.8457312897002 11.8384676918874 -42.7445238225652 1201688.65524758 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2071-Nov-24 07:51 < 00:01 Earth 0.115812432246825 0.115811387420222 0.115813477112011 26.0224103791615 26.0215262473226 2477804.827173972 0.0419351544389071 111.62973941274 11.5944275009861 64.6600443940489 1242450.11244077 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2084-Nov-29 15:54 < 00:01 Earth 0.240126441288521 0.240123638120206 0.240129244462629 28.9689787867218 28.9685957485485 2482559.162692044 0.0536614882710806 145.75269812789 11.3933063954357 24.1339135838653 1220831.63192185 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2097-Dec-06 16:54 < 00:01 Earth 0.405201095131613 0.405197693921889 0.405204496341903 32.556250603611 32.5560486234516 2487314.203958766 0.0586233382503797 168.550355123735 11.1611759639696 12.1047527988098 1127172.32168403 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2105-Jun-12 18:59 < 00:01 Earth 0.48456216068291 0.484560972242144 0.484563349145589 25.8272602279151 25.8270473226943 2490058.291299305 0.0342494435368733 164.112175859412 12.6486745906977 68.6627570970495 4903156.18748668 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2118-Jun-15 18:08 < 00:01 Earth 0.456948464324723 0.456948229131784 0.456948699514497 23.1616535865146 23.1614018316141 2494809.255550492 0.0249802617426096 176.271653699316 12.141922979911 87.6200719348281 5068493.43288791 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2131-Jun-17 00:30 < 00:01 Earth 0.481826088590976 0.481824817630318 0.481827359585186 21.3354302536476 21.3351710606418 2499558.521117863 0.0134721333882568 182.361556183558 11.7042719090754 -75.0477628417251 5274194.97714289 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2131-Nov-12 06:41 < 00:01 Earth 0.392342048166365 0.392337573622207 0.392346522715392 21.5119029928795 21.5115872948598 2499706.778415970 0.0468383276492074 201.003612349176 12.37433791343 -14.0406125988915 1051798.25536856 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2144-Nov-16 04:47 < 00:01 Earth 0.229992903495644 0.229988598691385 0.229997208323532 22.7669175253889 22.7664086651236 2504459.699588055 0.0689403101759779 212.915313006275 11.9172736944951 -27.203716237234 1191968.21526129 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2157-Nov-21 17:04 < 00:01 Earth 0.114555399580122 0.114553830706684 0.114556968639152 24.741386870633 24.7404467555874 2509213.211421340 0.0814804171507056 222.657170777415 11.6175809694366 -72.1123806057397 1279642.65479106 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2170-Nov-27 11:23 < 00:01 Earth 0.164489776422439 0.164485232057648 0.164494320873988 27.2477629891922 27.2471684953902 2513966.974593021 0.10353048449749 277.879291314674 11.420915258301 39.8764833831233 1279596.16900103 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2183-Dec-04 06:30 < 00:01 Earth 0.319808228268151 0.319801968963496 0.319814487581702 30.5733634084196 30.5730908990493 2518721.770789457 0.112534168279235 314.651639412145 11.2132577068197 17.3964326324585 1205679.6602192 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
2196-Dec-10 09:55 < 00:01 Earth 0.488626960474672 0.48862020171973 0.488633719229998 34.3162189248755 34.3160600202619 2523476.912906743 0.111870987343083 334.579527120552 11.0004996425802 9.46086172224065 1058312.41608694 T 366 CATAB v2.0c-linF95 2015-Sep-02 14:03:16 2015-Sep-02 14:03
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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