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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 365 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990802655188 3.9217e-08  
a 1.893913502923713 2.5142e-09 AU
q .8744216061974316 7.4363e-08 AU
i 41.18736974226152 5.1663e-06 deg
node 63.55627207406349 7.3224e-06 deg
peri 293.0560888717523 7.199e-06 deg
M 67.6711629243129 5.9785e-06 deg
tp 2456821.546673146997
(2014-Jun-13.04667315)
1.5598e-05 JED
period 952.0037026574463
2.61
1.8957e-06
5.19e-09
d
yr
n .3781497897488079 7.53e-10 deg/d
Q 2.913405399649995 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      .46197  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:40:37  

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-May); 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 0.451135665350558 0.451131772719426 0.45113955798179 33.8145836213962 33.8144089578506 2419745.736806229 0.0677185148350949 192.286123852691 11.2403155639991 9.42600100903444 989592.95435722 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1920-Jun-12 20:58 < 00:01 Earth 0.444885942450699 0.444885130185042 0.444886754740795 24.6626614190734 24.6624185759159 2422488.373384443 0.0314818192071519 164.20672689217 12.2512598533573 75.4200428467383 4791538.52632238 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1933-Jun-15 06:28 < 00:01 Earth 0.442506783476383 0.442506318204872 0.442507248763813 22.2803759129834 22.2801056587261 2427238.769790981 0.0174402713678576 133.189115992492 11.6489956961038 -84.8328851263325 5061498.72722911 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1946-Jun-16 00:15 < 00:01 Earth 0.491536412484097 0.491535422723542 0.491537402254739 20.6950321091114 20.6947701742489 2431987.510450634 0.0138476058322014 104.497278018682 11.1399660073677 -68.8314880658666 5423760.70234772 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1946-Nov-12 05:36 < 00:01 Earth 0.350649500386961 0.350647068006556 0.350651932769096 21.6421032672357 21.6417521572426 2432136.732988596 0.0309296693324066 109.271003832355 12.418396678242 -14.3480789459778 1017921.79726852 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1959-Nov-17 08:31 < 00:01 Earth 0.197423444016792 0.19742184282959 0.197425045208428 23.0737671234028 23.0731821977983 2436889.855021130 0.0296249731756292 81.2387152612866 12.0197278777134 -29.9255915684701 1139205.63294572 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1972-Nov-21 21:30 < 00:01 Earth 0.102883771717876 0.102883490951599 0.102884052485683 25.1545084469698 25.1534788706801 2441643.395930869 0.0206755816994209 49.2967710668513 11.7696650682353 -84.7740318425637 1190442.33462227 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1985-Nov-27 21:43 < 00:01 Earth 0.18307122268774 0.183070601378927 0.183071843997177 27.8281404162624 27.8276174036406 2446397.404954693 0.0153609918392542 34.2874249780358 11.5296637114756 33.7554149447832 1371153.7830407 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
1998-Dec-04 16:31 < 00:01 Earth 0.337946597209471 0.337946123669833 0.337947070749065 31.1800914057108 31.1798385407488 2451152.188299551 0.0112987105607925 23.6645802330944 11.2541092684367 18.5793390865344 2334758.51992864 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2006-Jun-10 20:04 < 00:01 Earth 0.494839252282203 0.494838839702448 0.494839664862005 26.8141064476585 26.8139056371149 2453897.336182801 0.0105382009990072 31.6963872811245 12.7082690949102 58.7712756408741 4733174.07828375 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2019-Jun-14 06:02 < 00:01 Earth 0.450374050571271 0.450373750810207 0.450374350332365 23.9983388063657 23.998092281888 2458648.751706332 0.0120482011757866 39.2493325111114 12.3505335387584 79.5485368833154 4873463.72205925 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2032-Jun-15 03:21 < 00:01 Earth 0.458463403851027 0.458463042934955 0.458463764768056 21.8763569490385 21.8760912834414 2463398.639429564 0.0127627251787487 52.2167647583301 11.8763393408828 -80.4439897049469 5077636.11559506 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2032-Nov-08 20:12 < 00:01 Earth 0.469431928713423 0.469430712213468 0.469433145213592 21.1484101020353 21.1481417130033 2463545.341931975 0.0132641180673033 54.0284352555656 12.6646241423229 -11.8178707737742 1508404.90924004 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2045-Nov-13 05:48 < 00:01 Earth 0.303696070137626 0.303694487865176 0.303697652411336 22.0426809708712 22.042282943727 2468297.741814214 0.0220392315266167 72.8856918053413 12.1728077648624 -18.8732737537064 1198696.71856826 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2058-Nov-18 16:40 < 00:01 Earth 0.153292788959118 0.15329127593581 0.153294301994578 23.7672027179047 23.7664713780477 2473051.194639581 0.0325786599930763 90.8457292269598 11.8384676670412 -42.7445221817235 1201688.63929224 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2071-Nov-24 07:51 < 00:01 Earth 0.1158124305846 0.115811385758283 0.115813475449499 26.0224103194779 26.0215261876242 2477804.827173882 0.0419351536615017 111.629728481297 11.5944276012491 64.6600494936977 1242450.13543533 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2084-Nov-29 15:54 < 00:01 Earth 0.240126436471572 0.240123633303493 0.240129239645443 28.9689786760927 28.9685956379102 2482559.162691694 0.0536614878679344 145.752688566316 11.3933064590907 24.1339159676422 1220831.71196319 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2097-Dec-06 16:54 < 00:01 Earth 0.405201088614821 0.405197687405383 0.405204489824825 32.5562504689288 32.5560484887653 2487314.203958779 0.0586233387008304 168.550342354287 11.1611759485046 12.104754848441 1127172.48289211 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2105-Jun-12 18:59 < 00:01 Earth 0.484562162949536 0.484560974508376 0.484563351412405 25.8272603355817 25.8270474303628 2490058.291299250 0.0342494438103918 164.112183682398 12.648674790127 68.662754798004 4903156.05984678 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2118-Jun-15 18:08 < 00:01 Earth 0.456948464317988 0.456948229127303 0.456948699506403 23.1616538807077 23.1614021258104 2494809.255549505 0.0249802638027453 176.271662146504 12.1419232272408 87.6200696540023 5068493.33332169 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2131-Jun-17 00:30 < 00:01 Earth 0.481826086038226 0.481824815077673 0.481827357031965 21.3354301419338 21.3351709489252 2499558.521118737 0.0134721333335897 182.361565921423 11.7042719955408 -75.0477653315102 5274194.96518652 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2131-Nov-12 06:41 < 00:01 Earth 0.392342057472854 0.392337582928962 0.392346532021614 21.5119029075121 21.5115872094986 2499706.778414742 0.0468383228025501 201.003597358323 12.3743382530197 -14.0406093535791 1051798.03285698 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2144-Nov-16 04:47 < 00:01 Earth 0.229992914444628 0.229988609640536 0.229997219272348 22.7669173748575 22.7664085146131 2504459.699587162 0.0689403052078552 212.915295588489 11.917273929658 -27.2037116563318 1191968.06566686 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2157-Nov-21 17:04 < 00:01 Earth 0.114555404588984 0.114553835714803 0.114556973648756 24.7413866222413 24.7404465072274 2509213.211420465 0.0814804152932533 222.657157601982 11.6175810327734 -72.1123702816961 1279642.62741764 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2170-Nov-27 11:23 < 00:01 Earth 0.164489757427192 0.164485213063132 0.164494301878011 27.2477625822562 27.2471680883766 2513966.974592573 0.103530483828197 277.879276338846 11.4209153442001 39.8764908440042 1279596.20771517 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2183-Dec-04 06:30 < 00:01 Earth 0.319808197674834 0.319801938370279 0.319814456988285 30.5733627547409 30.5730902453386 2518721.770788323 0.112534172561398 314.651638462745 11.2132577329659 17.3964356068273 1205679.73613356 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
2196-Dec-10 09:55 < 00:01 Earth 0.48862692431104 0.488620165555766 0.488633683066699 34.3162180644535 34.3160591598242 2523476.912904513 0.111870994497615 334.579544104676 11.0004994619795 9.46086329559403 1058312.51766132 T 365 CATAB v2.0c-linF95 2015-Jul-06 11:40:43 2015-Jul-06 11:40
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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