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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 371 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .538452799822692 3.9226e-08  
a 1.893707991837282 2.5317e-09 au
q .8740356215858901 7.4388e-08 au
i 41.19264033414944 5.1558e-06 deg
node 63.50832968502562 7.316e-06 deg
peri 293.0845321423939 7.1861e-06 deg
M 218.9545926774292 6.1619e-06 deg
tp 2457773.427485958540
(2017-Jan-19.92748596)
1.6769e-05 JED
period 951.8487520691538
2.61
1.9088e-06
5.226e-09
d
yr
n .3782113484074256 7.5846e-10 deg/d
Q 2.913380362088675 3.895e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2555  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      22284 days (61.01 yr)  
   first obs. used      1955-01-26  
   last obs. used      2016-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46317  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-01 06:19:31  

Additional Information
 Earth MOID = .103004 au 
 Jupiter MOID = 3.2485 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-December); 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 0.451135620736385 0.451131728881908 0.451139512590962 33.8145826666324 33.8144080030646 2419745.736804459 0.0677030862241106 192.247898113142 11.2313645046122 9.42593535322615 990310.119360588 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1920-Jun-12 20:58 < 00:01 Earth 0.444885947788187 0.444885135521848 0.444886760078693 24.6626621963698 24.6624193532228 2422488.373383269 0.0314689652627868 164.18905926776 12.2430362545095 75.4177382722008 4794706.1744622 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1933-Jun-15 06:28 < 00:01 Earth 0.442506777146567 0.442506312170625 0.442507242136285 22.2803763282286 22.2801060739725 2427238.769790786 0.0174296915554764 133.177178906041 11.6379580090381 -84.8358256210178 5066322.1620463 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1946-Jun-16 00:15 < 00:01 Earth 0.4915364017082 0.491535412221133 0.491537391205133 20.6950323056813 20.6947703708156 2431987.510450885 0.0138433520265284 104.490464832437 11.1254134103914 -68.8350853635056 5430974.00556454 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1946-Nov-12 05:36 < 00:01 Earth 0.35064952553514 0.350647093684517 0.350651957387471 21.642103236914 21.6417521269456 2432136.732988884 0.0309193983135692 109.247721204571 12.41731890592 -14.3497171225839 1018125.27684994 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1959-Nov-17 08:31 < 00:01 Earth 0.197423460325613 0.197421859518524 0.197425061137135 23.0737670396913 23.073182114133 2436889.855020965 0.0296146870148111 81.2205175781315 12.0182944908944 -29.9274004922486 1139406.35842071 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1972-Nov-21 21:30 < 00:01 Earth 0.102883773855138 0.102883493167137 0.10288405454475 25.1545083637852 25.1534787875136 2441643.395930281 0.0206671642353104 49.2849402510324 11.7670101458286 -84.7771525509562 1190716.55129301 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1985-Nov-27 21:43 < 00:01 Earth 0.18307121726585 0.183070596083199 0.183071838449126 27.8281403718485 27.8276173592104 2446397.404954365 0.0153548086195646 34.2784901629928 11.5251590372558 33.7485907608342 1371480.51044869 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
1998-Dec-04 16:31 < 00:01 Earth 0.337946594305909 0.337946120850905 0.337947067760929 31.1800914114498 31.1798385464857 2451152.188299067 0.0112959214224651 23.6585334101612 11.2475515311897 18.5573577969769 2334922.51721561 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2006-Jun-10 20:04 < 00:01 Earth 0.49483924985114 0.494838837510304 0.494839662192175 26.8141064704687 26.8139056599243 2453897.336182961 0.0105319059939965 31.6872890782132 12.7039094653239 58.7881931710679 4735455.15004167 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2019-Jun-14 06:02 < 00:01 Earth 0.450374048062621 0.450373748566087 0.450374347558999 23.9983388265035 23.9980923020246 2458648.751706413 0.0120433004604015 39.2318497605844 12.3436385991997 79.5680250052659 4876458.58050211 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2032-Jun-15 03:21 < 00:01 Earth 0.458463402725407 0.458463041842586 0.45846376360954 21.8763570710484 21.8760914054521 2463398.639429116 0.0127578415486107 52.1937731680109 11.865842194769 -80.4274036728666 5081890.00040528 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2032-Nov-08 20:12 < 00:01 Earth 0.469431925804765 0.469430709457 0.469433142152689 21.148410182862 21.1481417938293 2463545.341931668 0.0132572963212578 54.0204273269067 12.6634009491519 -11.8157430435215 1508481.78726788 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2045-Nov-13 05:48 < 00:01 Earth 0.303696063975192 0.303694481934403 0.303697646017242 22.0426811146221 22.0422830874724 2468297.741814500 0.022035125980355 72.8742905083198 12.1715888311233 -18.872398059505 1198787.68156101 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2058-Nov-18 16:40 < 00:01 Earth 0.153292781251725 0.153291268476016 0.153294294039583 23.7672029554876 23.7664716156012 2473051.194640016 0.0325747191131646 90.8305883953364 11.8363642308137 -42.7444275437568 1201899.80310705 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2071-Nov-24 07:51 < 00:01 Earth 0.115812438640552 0.115811393988739 0.115813483330964 26.0224106905969 26.0215265588173 2477804.827174775 0.0419300872028399 111.610503388276 11.5906622532716 64.6597360974387 1242850.21135534 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2084-Nov-29 15:54 < 00:01 Earth 0.240126458648807 0.240123655963561 0.240129261339844 28.9689792376139 28.9685961994742 2482559.162692826 0.0536545364539048 145.726974628714 11.3870585868203 24.1333738658089 1221463.35028166 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2097-Dec-06 16:54 < 00:01 Earth 0.405201117018594 0.405197716404002 0.40520451763373 32.5562511937327 32.5560492135878 2487314.203960106 0.0586153383858959 168.520339724343 11.1518112058761 12.104020250542 1127992.81802055 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2105-Jun-12 18:59 < 00:01 Earth 0.484562149860882 0.484560961976062 0.484563337767605 25.8272598264671 25.8270469212383 2490058.291299831 0.0342467099173079 164.066092324583 12.6411638544407 68.6663691489614 4906187.87594475 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2118-Jun-15 18:08 < 00:01 Earth 0.456948461906638 0.456948226977427 0.456948696830322 23.1616533452409 23.1614015903364 2494809.255550201 0.0249787717265533 176.222623312123 12.1317826002229 87.6238342480925 5072743.6543145 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2131-Jun-17 00:30 < 00:01 Earth 0.481826097660358 0.481824826828396 0.481827368525265 21.3354299656358 21.3351707726313 2499558.521117965 0.0134676300586141 182.310529273543 11.6908084368858 -75.0436863000418 5280167.71529838 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2131-Nov-12 06:41 < 00:01 Earth 0.392342009684682 0.392337535939087 0.392346483435144 21.5119032790792 21.5115875810327 2499706.778417211 0.0468303070008388 200.966911514162 12.3731440851667 -14.0399271340801 1051857.53239703 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2144-Nov-16 04:47 < 00:01 Earth 0.229992864993577 0.229988560964604 0.229997169046168 22.7669180591779 22.7664091988393 2504459.699589706 0.0689296445432447 212.876263265799 11.9156257186968 -27.203381502573 1192120.15085099 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2157-Nov-21 17:04 < 00:01 Earth 0.114555386553958 0.114553817969465 0.114556955323943 24.7413876310839 24.7404475159604 2509213.211423285 0.0814679340822821 222.616104528585 11.6145066020439 -72.1123517562089 1279981.00144955 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2170-Nov-27 11:23 < 00:01 Earth 0.164489819334343 0.164485275801561 0.164494362953851 27.2477640497113 27.2471695560874 2513966.974595157 0.103514048933341 277.827861965838 11.4156398745525 39.8763403282436 1280183.16750717 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2183-Dec-04 06:30 < 00:01 Earth 0.319808287205089 0.319802029044025 0.319814545375081 30.5733647661695 30.5730922568615 2518721.770792041 0.112516027326755 314.593621374185 11.2049315346592 17.3961627978112 1206549.30751203 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
2196-Dec-10 09:55 < 00:01 Earth 0.48862702527976 0.488620267752744 0.488633782807213 34.3162204969472 34.316061592362 2523476.912909206 0.111852806610949 334.51826929895 10.9887147424777 9.46048732017905 1059372.29755377 T 371 CATAB v2.0c-linF95 2016-Feb-01 06:19:41 2016-Feb-01 06:19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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