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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 325 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .538299092405896 4.0618e-08  
a 1.893913502677681 2.5635e-09 AU
q .8744215830910138 7.7051e-08 AU
i 41.18736648817313 5.6723e-06 deg
node 63.55627442188608 7.4607e-06 deg
peri 293.0560883454134 7.3624e-06 deg
M 67.67116293463378 6.0637e-06 deg
tp 2456821.546673154574
(2014-Jun-13.04667315)
1.5823e-05 JED
period 952.0037024719387
2.61
1.9328e-06
5.292e-09
d
yr
n .3781497898224943 7.6775e-10 deg/d
Q 2.913405422264348 3.9434e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2355  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      21366 days (58.50 yr)  
   first obs. used      1955-01-26  
   last obs. used      2013-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46718  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:35:15  

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 0.451135758114457 0.451131795795353 0.451139720433719 33.8145852971475 33.8144106336464 2419745.736813204 0.0693034646511224 195.775687415675 11.5109369710611 9.4987497226189 973504.489392832 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1920-Jun-12 20:58 < 00:01 Earth 0.444885873283706 0.444885038190588 0.444886708402491 24.6626582886832 24.6624154454571 2422488.373390757 0.0325615504714502 167.909401414854 12.7621540094338 75.3686536119798 4598687.30543374 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1933-Jun-15 06:29 < 00:01 Earth 0.442506762032406 0.442506287556049 0.442507236524371 22.2803734417229 22.2801031874225 2427238.769795701 0.0184157606582973 136.264160149311 12.034387006581 -84.8716081292938 4899707.06905175 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1946-Jun-16 00:15 < 00:01 Earth 0.491536424578796 0.491535412095197 0.491537437072731 20.6950300367363 20.694768101854 2431987.510454818 0.0146318864393521 106.99114402077 11.4240823004701 -68.8392309475254 5289159.63661963 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1946-Nov-12 05:36 < 00:01 Earth 0.350649455067652 0.350646979063532 0.350651931073525 21.642102114714 21.6417510046569 2432136.732991667 0.0314516030611576 111.125995015116 13.112266330689 -14.1268981296974 958338.423369326 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1959-Nov-17 08:31 < 00:01 Earth 0.197423415686058 0.197421784343368 0.19742504703325 23.0737660869026 23.0731811611879 2436889.855024043 0.0302338137873839 82.5459236885871 12.6182642447136 -29.6670948300885 1079649.54235717 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1972-Nov-21 21:30 < 00:01 Earth 0.102883752750696 0.102883458881685 0.102884046621429 25.1545073250556 25.1534777485302 2441643.395932939 0.0211990216815493 49.9731831662299 12.2736932735161 -84.4393725680878 1140980.269361 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1985-Nov-27 21:43 < 00:01 Earth 0.18307119519126 0.183070568773352 0.1830718216098 27.8281391364072 27.8276161236828 2446397.404956544 0.0157896108163675 34.60530536855 11.944360732199 33.9897236674855 1336360.85517173 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
1998-Dec-04 16:31 < 00:01 Earth 0.337946557686607 0.337946078485645 0.337947036887583 31.1800899664544 31.1798371014512 2451152.188301180 0.0115996625608008 23.888167697254 11.6071727956402 18.1267848743034 2283408.25333495 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2006-Jun-10 20:04 < 00:01 Earth 0.494839208910038 0.494838787980955 0.49483962983955 26.8141054429003 26.8139046323315 2453897.336187271 0.0110975399988553 32.1188694744936 13.3560647014901 59.0781734776968 4524458.0359566 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2019-Jun-14 06:02 < 00:01 Earth 0.450374009895273 0.450373702285827 0.450374317504718 23.9983378783525 23.998091353843 2458648.751710451 0.0126658660861602 39.6464289757095 12.8551134898292 79.8992944731524 4687296.80867825 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2032-Jun-15 03:21 < 00:01 Earth 0.458463363203976 0.458462992432042 0.458463733976885 21.8763558592887 21.8760901936548 2463398.639434210 0.0135165870478066 52.8320019228611 12.2402129600313 -80.2083300317055 4923561.7280504 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2032-Nov-08 20:12 < 00:01 Earth 0.469432014203499 0.469430768518726 0.469433259888512 21.1484083739401 21.148139984935 2463545.341930983 0.0135585160618006 55.4339871579706 13.3702969810066 -12.4901344513649 1485392.40898363 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2045-Nov-13 05:48 < 00:01 Earth 0.30369616599577 0.303694548512472 0.303697783480402 22.0426787638151 22.0422807367566 2468297.741812749 0.022467927038512 74.6747169477472 12.821160022728 -19.3041589454848 1163838.13512108 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2058-Nov-18 16:40 < 00:01 Earth 0.153292863945378 0.153291321691633 0.153294406211963 23.7672000165659 23.7664686769835 2473051.194637750 0.0331502179263929 93.001048742604 12.4034140141748 -43.0483877057981 1153809.09614696 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2071-Nov-24 07:51 < 00:01 Earth 0.115812355376006 0.115811276794619 0.115813433997611 26.0224071089988 26.0215229764619 2477804.827171489 0.0426536836950072 114.25851117758 12.0639154663004 64.4404766207382 1191998.24616581 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2084-Nov-29 15:54 < 00:01 Earth 0.24012628157078 0.240123410946461 0.240129152201075 28.9689747529467 28.9685917144653 2482559.162688527 0.0545841525438016 149.085488253222 11.7743243981892 23.9876401658725 1175191.94933024 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2097-Dec-06 16:54 < 00:01 Earth 0.405200914420681 0.405197435698366 0.405204393143562 32.5562460403469 32.5560440600691 2487314.203954643 0.0596206454239998 172.315875025919 11.4615607665362 11.9947892819271 1089133.00308087 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2105-Jun-12 18:59 < 00:01 Earth 0.484562163628439 0.48456095774162 0.48456336953804 25.8272617461838 25.8270488409768 2490058.291300178 0.034817549035974 166.991647187131 13.1887874193658 68.7411001764749 4704956.30598373 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2118-Jun-15 18:08 < 00:01 Earth 0.456948425832302 0.456948183321812 0.45694866833759 23.1616544219856 23.161402667073 2494809.255552986 0.0254823979145759 179.373979427456 12.5533177505389 87.6775053107572 4902590.8754215 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2131-Jun-17 00:30 < 00:01 Earth 0.48182601345354 0.48182471719528 0.481827309746288 21.3354303772703 21.3351711842256 2499558.521121744 0.0142275369705977 185.57353607664 12.0042078939005 -75.007221170617 5141456.82989453 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2131-Nov-12 06:41 < 00:01 Earth 0.392342265138923 0.392337696184612 0.392346834098384 21.5119004459643 21.5115847480817 2499706.778411224 0.0478488102052885 205.364262347541 13.082254688323 -14.1880708500095 1006492.59279329 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2144-Nov-16 04:47 < 00:01 Earth 0.22999310013495 0.229988707863668 0.229997492431064 22.7669139744971 22.7664051145875 2504459.699582907 0.070285833843796 217.471653146816 12.5377725292511 -27.3292494568664 1138137.85347966 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2157-Nov-21 17:04 < 00:01 Earth 0.114555451721302 0.114553857414785 0.114557046221252 24.7413824949758 24.7404423801919 2509213.211415819 0.0829849831969649 227.379430430144 12.1408189813161 -72.2196175873069 1225237.6209008 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2170-Nov-27 11:23 < 00:01 Earth 0.164489546946212 0.164484900510864 0.16449419347167 27.2477571454958 27.2471626507368 2513966.974585580 0.105449451931916 283.790789505545 11.8513047451385 39.7991123987685 1231186.30960976 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2183-Dec-04 06:30 < 00:01 Earth 0.319807927318777 0.319801533385767 0.319814321260973 30.573356374939 30.5730838652496 2518721.770780524 0.114603309598154 321.308768193926 11.5548229484175 17.3361890336636 1166301.7718935 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
2196-Dec-10 09:55 < 00:01 Earth 0.488626640960382 0.488619738786423 0.48863354313471 34.316211108954 34.3160522042003 2523476.912896388 0.113911947296203 341.623298456458 11.2719800868421 9.41087395738201 1027759.63069272 T 325 CATAB v2.0c-linF95 2014-Jun-09 17:35:25 2014-Jun-09 17:35
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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