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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 340 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990904609188 3.9911e-08  
a 1.893913502506936 2.5349e-09 AU
q .8744215866957992 7.5697e-08 AU
i 41.18736758377329 5.4636e-06 deg
node 63.55627345257523 7.3726e-06 deg
peri 293.05608891541 7.2873e-06 deg
M 67.67116314736944 6.0453e-06 deg
tp 2456821.546672616205
(2014-Jun-13.04667262)
1.5774e-05 JED
period 952.0037023431972
2.61
1.9113e-06
5.233e-09
d
yr
n .3781497898736323 7.5919e-10 deg/d
Q 2.913405418318073 3.8994e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2416  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      21957 days (60.11 yr)  
   first obs. used      1955-01-26  
   last obs. used      2015-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46607  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-10 05:45:51  

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-Feb); 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.]
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 0.451135832599832 0.451131915810826 0.451139749388949 33.814587334756 33.8144126712944 2419745.736815985 0.068334624935392 193.507616594721 11.3849366995479 9.46814185618082 981560.538626803 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1920-Jun-12 20:58 < 00:01 Earth 0.444885875298944 0.444885053294757 0.444886697328419 24.6626577115363 24.6624148683056 2422488.373389950 0.0319246788847479 165.698784844714 12.4925662805677 75.3940614576269 4698451.61711938 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1933-Jun-15 06:29 < 00:01 Earth 0.442506783248983 0.442506314457538 0.442507252056035 22.2803731926857 22.2801029383952 2427238.769794737 0.0178813881385994 134.435433632352 11.8303484171745 -84.8543598955332 4984077.81353396 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1946-Jun-16 00:15 < 00:01 Earth 0.491536453419168 0.491535454626164 0.491537452222459 20.6950301404849 20.6947682056193 2431987.510453292 0.0142352699808084 105.518928981513 11.2766910856851 -68.8395577795594 5358311.18978761 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1946-Nov-12 05:36 < 00:01 Earth 0.350649398110454 0.350646951205919 0.35065184501672 21.6421030450168 21.6417519349177 2432136.732992967 0.0310923841236511 109.86228080082 12.779513962893 -14.226159958547 986285.750151205 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1959-Nov-17 08:31 < 00:01 Earth 0.197423373995113 0.197421762710763 0.197424985283897 23.0737670954253 23.0731821696126 2436889.855024510 0.0298321930542074 81.6222304884154 12.3353038640476 -29.7788423397115 1107025.72405443 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1972-Nov-21 21:30 < 00:01 Earth 0.102883749927273 0.102883462260891 0.10288403759523 25.1545082641593 25.153478687644 2441643.395933283 0.0208687056616814 49.4481226984218 12.0365790318442 -84.5766373749216 1163703.16564923 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1985-Nov-27 21:43 < 00:01 Earth 0.183071216452617 0.183070595115907 0.183071837789985 27.8281399877559 27.8276169751083 2446397.404956688 0.0155327680289241 34.3112921417091 11.7488913644009 33.911988325021 1354445.17008969 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
1998-Dec-04 16:31 < 00:01 Earth 0.337946571294471 0.337946094736299 0.337947047852596 31.1800905914746 31.1798377264866 2451152.188300930 0.0114559773437621 23.7842046393828 11.4415748852753 18.3574277387567 2307522.07318771 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2006-Jun-10 20:04 < 00:01 Earth 0.494839221906977 0.49483880559463 0.494839638219763 26.8141057680152 26.8139049574542 2453897.336185717 0.0108480863667749 31.9430666139551 13.0219646895552 59.0036059116963 4632415.76044769 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2019-Jun-14 06:02 < 00:01 Earth 0.450374025105934 0.450373721976125 0.450374328236055 23.9983384423873 23.9980919178919 2458648.751708616 0.0123889248271584 39.4884873665667 12.5900731216832 79.7631574025973 4783882.0698795 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2032-Jun-15 03:21 < 00:01 Earth 0.458463371973233 0.458463006044763 0.458463737902452 21.8763565912855 21.8760909256655 2463398.639432132 0.0131531345185571 52.5372387327827 12.0484075485369 -80.3027688361884 5003201.80125332 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2032-Nov-08 20:12 < 00:01 Earth 0.469432023003113 0.469430790014917 0.469433255991536 21.1484088788403 21.1481404898466 2463545.341929179 0.0134342249333975 54.8223012161621 13.0283045267442 -12.1483246397429 1494520.13062689 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2045-Nov-13 05:48 < 00:01 Earth 0.303696181752908 0.303694580842906 0.303697782664193 22.042679171408 22.0422811443776 2468297.741811742 0.0222800316036381 73.8342125544835 12.5121898559463 -19.0955861944436 1179861.70343429 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2058-Nov-18 16:40 < 00:01 Earth 0.153292881512698 0.153291353857188 0.153294409180706 23.7672002079051 23.7664688684125 2473051.194636333 0.0328776901930877 91.9367269502049 12.1375275927685 -42.9063847678445 1175829.86781657 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2071-Nov-24 07:51 < 00:01 Earth 0.115812342943182 0.115811281063982 0.115813404861747 26.0224070287842 26.0215228961497 2477804.827169695 0.0422902614602692 112.918071709334 11.844208364909 64.5405635021805 1215088.41239323 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2084-Nov-29 15:54 < 00:01 Earth 0.240126244404414 0.240123408664567 0.240129080150114 28.9689743080495 28.9685912695028 2482559.162686143 0.05410019919769 147.349027280334 11.5967596099639 24.0533380914027 1196022.68858607 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2097-Dec-06 16:54 < 00:01 Earth 0.405200866986709 0.405197429087337 0.405204304886646 32.5562452590482 32.5560432787419 2487314.203951712 0.0590854197893876 170.325149465002 11.3230106421411 12.0439724943392 1106447.43128461 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2105-Jun-12 18:59 < 00:01 Earth 0.484562196877742 0.484561001279337 0.484563392498504 25.8272631208462 25.8270502156652 2490058.291297581 0.0345410214191684 165.354153695882 12.9028095050312 68.7034897183289 4807962.48705513 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2118-Jun-15 18:08 < 00:01 Earth 0.456948440005438 0.456948201582279 0.456948678423663 23.1616557740324 23.1614040191422 2494809.255550481 0.0252491868898806 177.596543992181 12.3336463242347 87.6517350213082 4989818.47577886 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2131-Jun-17 00:30 < 00:01 Earth 0.481826004278627 0.481824722066096 0.481827286524593 21.3354314060226 21.3351722129855 2499558.521120451 0.013858881888436 183.719426656702 11.845315178359 -75.0232083011076 5210806.48726467 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2131-Nov-12 06:41 < 00:01 Earth 0.392342329655393 0.39233781231533 0.392346847000434 21.5119006603707 21.5115849625432 2499706.778408889 0.0473128378423762 202.993245076676 12.7385378724349 -14.1174684574624 1028011.60212968 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2144-Nov-16 04:47 < 00:01 Earth 0.229993164666831 0.22998882079918 0.229997508558663 22.7669137379552 22.7664048781831 2504459.699579450 0.0695500444953037 214.971467516697 12.2418023460444 -27.270562423192 1163203.85055447 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2157-Nov-21 17:04 < 00:01 Earth 0.114555475872323 0.114553896287981 0.114557055645713 24.7413818962178 24.7404417816093 2509213.211412348 0.0821463970467346 224.767529590732 11.8938050911011 -72.1703857378393 1250336.51283333 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2170-Nov-27 11:23 < 00:01 Earth 0.164489481234961 0.16448489093272 0.164494071625438 27.2477559884254 27.2471614934037 2513966.974581457 0.104370913430217 280.507413605802 11.6494472768279 39.8341256879946 1253417.04508078 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2183-Dec-04 06:30 < 00:01 Earth 0.319807837870632 0.319801518718768 0.319814157031511 30.5733547440974 30.5730822343172 2518721.770775864 0.113432849737601 317.598013052384 11.3962120113377 17.3632584936762 1184264.55005036 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
2196-Dec-10 09:55 < 00:01 Earth 0.488626547272749 0.48861972511865 0.488633369427243 34.3162091972071 34.316050292414 2523476.912891840 0.112751594054059 337.685732224812 11.1487442006223 9.43338926252147 1041512.25531985 T 340 CATAB v2.0c-linF95 2015-Mar-10 05:45:59 2015-Mar-10 05:46
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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