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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 363 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990805971477 3.9235e-08  
a 1.893913502901397 2.5145e-09 AU
q .8744216055590516 7.4398e-08 AU
i 41.187369788 5.174e-06 deg
node 63.5562720662903 7.3242e-06 deg
peri 293.0560889314712 7.201e-06 deg
M 67.67116290905294 5.9787e-06 deg
tp 2456821.546673190514
(2014-Jun-13.04667319)
1.5599e-05 JED
period 952.00370264062
2.61
1.8959e-06
5.191e-09
d
yr
n .3781497897554916 7.5308e-10 deg/d
Q 2.913405400243742 3.868e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2535  
   # 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      .46204  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-09 06:15:24  

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 0.451135671644178 0.451131778661527 0.451139564626868 33.8145837940837 33.8144091305415 2419745.736806271 0.0677301627307207 192.30413279872 11.2435586244971 9.42704919287689 989425.526488109 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1920-Jun-12 20:58 < 00:01 Earth 0.444885941246734 0.444885128761735 0.444886753756612 24.6626613006523 24.662418457493 2422488.373384627 0.031492934275875 164.232799853563 12.2590677353506 75.4191257418012 4788467.78890542 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1933-Jun-15 06:28 < 00:01 Earth 0.442506784883662 0.442506319538862 0.442507250244384 22.2803758428528 22.2801055885955 2427238.769791046 0.0174530281077027 133.211701698308 11.6548571415719 -84.8336599764351 5058959.46260252 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1946-Jun-16 00:15 < 00:01 Earth 0.491536415838797 0.491535425908247 0.491537405779436 20.6950320474525 20.694770112591 2431987.510450735 0.0138585947553515 104.516694447687 11.1442180600872 -68.8318829756125 5421707.4017321 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1946-Nov-12 05:36 < 00:01 Earth 0.350649494013126 0.350647061400361 0.350651926627622 21.6421033648439 21.641752254846 2432136.732989345 0.0309325702200364 109.279966328101 12.4274853571657 -14.3448709820466 1017102.84690615 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1959-Nov-17 08:31 < 00:01 Earth 0.197423439139562 0.197421837770413 0.197425040513137 23.0737672245402 23.0731822989238 2436889.855021533 0.0296293849453603 81.2447251836959 12.0274858604063 -29.9218554710166 1138392.78648057 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1972-Nov-21 21:30 < 00:01 Earth 0.102883770542356 0.102883489610542 0.102884051475621 25.1545085101088 25.15347893381 2441643.395930891 0.0206804129633012 49.2993125228179 11.776099780862 -84.7692012653273 1189783.46455688 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1985-Nov-27 21:43 < 00:01 Earth 0.183071222507358 0.183070601197518 0.183071843817857 27.8281404539102 27.8276174412886 2446397.404954741 0.0153655153954134 34.2879590140417 11.5348426634456 33.7589096075909 1370746.83667131 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
1998-Dec-04 16:31 < 00:01 Earth 0.337946597013904 0.337946123441971 0.337947070585793 31.1800914400485 31.1798385750866 2451152.188299655 0.0113019698929729 23.6654355950887 11.258455740908 18.5737516583826 2334227.64209486 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2006-Jun-10 20:04 < 00:01 Earth 0.494839251940229 0.494838839244605 0.494839664636298 26.8141063541945 26.8139055436501 2453897.336183308 0.0105453030921604 31.7007199278419 12.7180983081609 58.7746250520795 4729816.91994589 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2019-Jun-14 06:02 < 00:01 Earth 0.450374050798884 0.450373750918472 0.450374350678839 23.9983386986655 23.9980921741868 2458648.751706940 0.0120559995050449 39.2506133801846 12.3581969131475 79.5524473594931 4870506.33029443 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2032-Jun-15 03:21 < 00:01 Earth 0.458463404240747 0.458463043215182 0.458463765267623 21.8763570519639 21.8760913863682 2463398.639429142 0.0127730169670537 52.2178227496128 11.881867551291 -80.4413430836242 5075239.61283193 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2032-Nov-08 20:12 < 00:01 Earth 0.469431929655375 0.469430712967216 0.469433146343749 21.1484100975344 21.1481417085029 2463545.341930634 0.0132666296564714 54.0381981980027 12.6739555445675 -11.8280881646673 1508299.26025331 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2045-Nov-13 05:48 < 00:01 Earth 0.303696071400442 0.30369448892199 0.303697653880128 22.0426809822241 22.0422829550817 2468297.741814036 0.0220413409398668 72.8974451897121 12.1813416421062 -18.8796421318168 1198287.35143835 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2058-Nov-18 16:40 < 00:01 Earth 0.153292789636136 0.153291276474606 0.153294302809822 23.7672027212246 23.7664713813709 2473051.194639453 0.0325806778582211 90.8594725683715 11.8458351168263 -42.7489235128205 1201048.54558743 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2071-Nov-24 07:51 < 00:01 Earth 0.115812428687604 0.115811383569211 0.115813473844615 26.0224103261957 26.0215261943277 2477804.827174127 0.0419375350859949 111.646484424365 11.6004624286843 64.656888288588 1241772.84171877 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2084-Nov-29 15:54 < 00:01 Earth 0.240126435108807 0.240123631498064 0.240129238725344 28.9689786880585 28.9685956498741 2482559.162691772 0.053664632080754 145.773265508686 11.3981101156954 24.1318344333181 1220231.82933404 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2097-Dec-06 16:54 < 00:01 Earth 0.405201089276571 0.405197687589308 0.405204490964401 32.5562504974997 32.5560485173367 2487314.203958387 0.0586266883271835 168.572986825924 11.1648688897772 12.1032004261459 1126689.33175856 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2105-Jun-12 18:59 < 00:01 Earth 0.484562162062387 0.484560973572755 0.484563350574062 25.8272602623385 25.8270473571186 2490058.291299438 0.034251149222359 164.124110486494 12.6569685520184 68.6639251206052 4899984.5664411 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2118-Jun-15 18:08 < 00:01 Earth 0.456948464686397 0.456948229369943 0.456948699998225 23.1616537700682 23.1614020151699 2494809.255549659 0.0249831056676757 176.284598835568 12.1482278325403 87.6209012696162 5065865.98009758 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2131-Jun-17 00:30 < 00:01 Earth 0.481826090397272 0.481824819294957 0.481827361533509 21.3354301676463 21.3351709746404 2499558.521118136 0.0134824458876397 182.375025340626 11.7088323783245 -75.0472108690482 5272127.73134889 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2131-Nov-12 06:41 < 00:01 Earth 0.392342043976011 0.392337568900077 0.392346519056797 21.5119030431895 21.5115873451671 2499706.778416070 0.0468442036167841 201.029120503319 12.3837031635589 -14.0427844249617 1051190.37960788 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2144-Nov-16 04:47 < 00:01 Earth 0.229992896139009 0.229988590868202 0.229997201433462 22.7669176458283 22.7664087855494 2504459.699588540 0.068946863041793 212.941578014206 11.9254117127035 -27.20553550485 1191235.10802359 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2157-Nov-21 17:04 < 00:01 Earth 0.114555395737937 0.114553826779549 0.114556964881978 24.7413870505515 24.7404469354812 2509213.211421885 0.0814869934482172 222.684157776093 11.624361534779 -72.1139204899027 1278907.42192146 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2170-Nov-27 11:23 < 00:01 Earth 0.164489784671622 0.164485239674058 0.164494329755941 27.2477632235303 27.2471687297631 2513966.974593548 0.103539006820024 277.913344225194 11.4264043491312 39.8753782818985 1278953.22088549 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2183-Dec-04 06:30 < 00:01 Earth 0.319808240528052 0.3198019804347 0.319814500630265 30.5733637245022 30.5730912151451 2518721.770790375 0.112543250116216 314.689762747139 11.2175211411337 17.3955773265575 1205168.81361147 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
2196-Dec-10 09:55 < 00:01 Earth 0.488626975218914 0.488620215638084 0.488633734800126 34.3162192807947 34.3160603761875 2523476.912906887 0.111879833177017 334.619650653389 11.0038120509851 9.4601519132329 1057925.39855095 T 363 CATAB v2.0c-linF95 2015-Jun-09 06:15:42 2015-Jun-09 06:16
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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