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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 410 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5385552325438426 3.8884e-08  
a 1.893583579120616 2.5087e-09 au
q .8737842343261109 7.375e-08 au
i 41.20038450800718 5.0274e-06 deg
node 63.49874849053968 7.093e-06 deg
peri 293.0972740896065 6.9367e-06 deg
M 294.6023013973443 6.2457e-06 deg
tp 2457773.396065236020
(2017-Jan-19.89606524)
1.6735e-05 JED
period 951.7549518545211
2.61
1.8914e-06
5.178e-09
d
yr
n .3782486230289949 7.5167e-10 deg/d
Q 2.913382923915121 3.8597e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2778  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      22371 days (61.25 yr)  
   first obs. used      1955-01-26  
   last obs. used      2016-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45482  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-26 05:48:24  

Additional Information
 Earth MOID = .102124 au 
 Jupiter MOID = 3.24744 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. 2016-February); 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 0.451135725694878 0.451131854282935 0.451139597106966 33.8145849482754 33.81441028476 2419745.736809329 0.0673152675014964 191.256076009904 10.9293456067167 9.4494599922238 1017486.84463527 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1920-Jun-12 20:58 < 00:01 Earth 0.444885940686075 0.44488512880955 0.444886752587874 24.662660719655 24.6624178764896 2422488.373385969 0.031185620803841 163.798547491761 11.9901586079014 75.363290494232 4894589.30506517 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1933-Jun-15 06:29 < 00:01 Earth 0.442506793970775 0.442506336764862 0.442507251191861 22.2803754870236 22.2801052327676 2427238.769792155 0.0172070260504998 132.931196170994 11.3114698713355 -84.9017577776047 5213080.25002817 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1946-Jun-16 00:15 < 00:01 Earth 0.491536426443231 0.491535442986006 0.491537409910577 20.6950319670763 20.6947700322194 2431987.510451220 0.013732309905041 104.367266740705 10.7174706674727 -68.9089247119296 5640135.868676 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1946-Nov-12 05:36 < 00:01 Earth 0.350649463626062 0.350647044858279 0.350651882395558 21.6421035824263 21.6417524724016 2432136.732991123 0.0305743490130489 108.659395558135 12.4094820728821 -14.354911391508 1019870.66046111 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1959-Nov-17 08:31 < 00:01 Earth 0.197423421724369 0.19742182962542 0.197425013827703 23.0737674483412 23.0731825226788 2436889.855022743 0.0293036667358576 80.7689650338156 11.9799636739174 -29.9221548956265 1143054.12868124 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1972-Nov-21 21:30 < 00:01 Earth 0.102883773659455 0.102883494972929 0.102884052347581 25.1545086262129 25.1534790499501 2441643.395931473 0.0204294403565144 48.995859835708 11.6733109738741 -84.7751195533774 1200269.30039424 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1985-Nov-27 21:43 < 00:01 Earth 0.183071230682588 0.183070613230235 0.183071848135499 27.8281404941096 27.8276174815122 2446397.404955062 0.0152022410440501 34.0574102344684 11.3626528336519 33.6561372266387 1386549.00076944 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
1998-Dec-04 16:31 < 00:01 Earth 0.337946598619007 0.337946127731411 0.337947069506719 31.1800913418176 31.1798384768562 2451152.188299641 0.0112435631731143 23.4778951180313 11.0206591439566 17.9201963476478 2342510.92655912 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2006-Jun-10 20:04 < 00:01 Earth 0.4948392651401 0.494838861572444 0.494839668708185 26.8141065772496 26.8139057667121 2453897.336183949 0.0104595960311024 31.2515696370449 12.5582100946149 59.2984551934994 4811340.94957583 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2019-Jun-14 06:02 < 00:01 Earth 0.450374059875379 0.450373768948987 0.450374350801879 23.9983390941456 23.9980925696759 2458648.751707055 0.0119947417454553 38.5279337168554 12.1177421903201 80.1417526089723 4975360.5647841 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2032-Jun-15 03:21 < 00:01 Earth 0.458463402696972 0.45846304409024 0.458463761305236 21.8763573327213 21.8760916671282 2463398.639429985 0.0126847875593396 51.3481628905953 11.5429018079442 -79.9507899493168 5216862.70405708 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2032-Nov-08 20:12 < 00:01 Earth 0.469431950034715 0.469430739730649 0.46943316033894 21.1484100943035 21.1481417052836 2463545.341932595 0.0130555229552931 53.7323597374723 12.6593226318061 -11.810735266205 1512942.46016339 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2045-Nov-13 05:48 < 00:01 Earth 0.303696100400828 0.303694526895797 0.303697673907084 22.0426807950512 22.0422827679435 2468297.741814631 0.0219379620380577 72.4852129579186 12.1540171942133 -18.9031019866093 1202905.1964632 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2058-Nov-18 16:40 < 00:01 Earth 0.15329282016742 0.153291316700823 0.153294323646054 23.7672022245824 23.7664708848591 2473051.194638715 0.03247185752853 90.3380782215382 11.7752992163566 -42.7946952052499 1209244.6598402 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2071-Nov-24 07:51 < 00:01 Earth 0.11581241367003 0.115811372781915 0.115813454596307 26.0224095351386 26.0215254031292 2477804.827172900 0.0417850573829872 111.017725620852 11.4644702462106 64.6044877194088 1255946.1813779 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2084-Nov-29 15:54 < 00:01 Earth 0.240126381649203 0.240123592832369 0.240129170471717 28.9689774143029 28.9685943760163 2482559.162689597 0.0534428360635402 144.947026214979 11.1792569100361 24.0811436827026 1241249.43685208 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2097-Dec-06 16:54 < 00:01 Earth 0.405201019801474 0.405197636735095 0.405204402868404 32.5562488267791 32.5560468465711 2487314.203956283 0.0583643029481136 167.615388744488 10.8535850961797 12.0512025047897 1152300.93131534 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2105-Jun-12 18:59 < 00:01 Earth 0.484562198071325 0.484561026735909 0.484563369428109 25.8272618894735 25.8270489842828 2490058.291298014 0.0341660402877053 162.620262907404 12.399145884904 68.7645070399005 5005221.74513121 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2118-Jun-15 18:08 < 00:01 Earth 0.456948471074405 0.456948244324768 0.456948697816638 23.1616550095118 23.1614032546305 2494809.255549798 0.0249567594415337 174.695775092485 11.8169408971193 87.7240303339292 5208265.76238878 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2131-Jun-17 00:30 < 00:01 Earth 0.4818260631041 0.48182479767786 0.481827328563156 21.3354311036898 21.3351719106806 2499558.521118998 0.0133872624060601 180.735677695994 11.2940369013622 -74.9363466850362 5462891.21108467 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2131-Nov-12 06:41 < 00:01 Earth 0.392342146625912 0.392337697086128 0.392346596170515 21.5119025230745 21.5115868251271 2499706.778413747 0.0466473424235431 199.873737858531 12.3661720157017 -14.0405732265957 1052791.37876238 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2144-Nov-16 04:47 < 00:01 Earth 0.229993000082619 0.229988719989956 0.229997280198669 22.7669165239647 22.7664076638907 2504459.699585823 0.0686512973126178 211.712139941774 11.8798493774733 -27.2152083247222 1196218.97809623 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2157-Nov-21 17:04 < 00:01 Earth 0.114555438042623 0.114553879780539 0.114556996488231 24.7413852769014 24.7404451621109 2509213.211417916 0.0811186276999577 221.398036494979 11.5201268791999 -72.1331637863449 1290617.76735741 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2170-Nov-27 11:23 < 00:01 Earth 0.16448967412388 0.164485153751764 0.164494194581708 27.2477605492971 27.2471660550721 2513966.974588545 0.10303956982882 276.321955426664 11.2454123338616 39.853958836495 1298925.41334433 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2183-Dec-04 06:30 < 00:01 Earth 0.319808083678388 0.319801858356405 0.319814309009134 30.5733602301195 30.5730877205976 2518721.770784513 0.111981128516903 312.898703624795 10.9424037640501 17.3717994987095 1233557.48654846 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
2196-Dec-10 09:55 < 00:01 Earth 0.488626803165664 0.488620081153113 0.488633525178599 34.3162151645239 34.3160562598418 2523476.912900054 0.111310370408454 332.731060187764 10.6328066169533 9.43418598030469 1090826.87472421 T 410 CATAB v2.0c-linF95 2016-Apr-26 05:48:36 2016-Apr-26 05:48
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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