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1866 Sisyphus (1972 XA)
Classification: Apollo [NEO]          SPK-ID: 2001866
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 714 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5380833050933933 3.2667e-08  
a 1.893699209971067 2.2335e-09 au
q .8747312802170873 6.19e-08 au
i 41.19929068817949 4.3776e-06 deg
node 63.49079971436997 6.1649e-06 deg
peri 293.0630044424317 6.3143e-06 deg
M 104.1846730289839 5.554e-06 deg
tp 2458725.035107815313
(2019-Aug-29.53510782)
1.4363e-05 TDB
period 951.8421309332052
2.61
1.684e-06
4.611e-09
d
yr
n .3782139792940755 6.6913e-10 deg/d
Q 2.912667139725046 3.4353e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4569  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      23911 days (65.46 yr)  
   first obs. used      1955-01-26  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:42:18  

Additional Information
 Earth MOID = .104589 au 
 Jupiter MOID = 3.25074 au 
 T_jup = 3.513 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456436.5 (2013-May-24.0) TDB
Reference: JPL 714 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5384134958025194 3.2654e-08  
q .8740570689278057 6.1877e-08 au
tp 2456821.519811395696
(2014-Jun-13.01981140)
1.2471e-05 TDB
node 63.5591348967254 6.1696e-06 deg
peri 293.0595395481139 6.3164e-06 deg
i 41.19314102653448 4.3785e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      4569  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      23911 days (65.46 yr)  
   first obs. used      1955-01-26  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:42:18  

Additional Information
 Jupiter MOID = 3.25074 au 
 T_jup = 3.513 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.066266986586482E-15 -2.020261620683877E-15 8.864898693337103E-14 1.739984685495177E-14 9.599937681570352E-15 8.662332583940489E-16
q -2.020261620683877E-15 3.828811346722739E-15 -1.622065992306625E-13 -3.307107358861999E-14 -1.715755925847839E-14 -1.727278197463517E-15
tp 8.864898693337103E-14 -1.622065992306625E-13 1.555267403918565E-10 -3.468894015059733E-12 4.263071093067876E-11 -2.249333888681733E-12
node 1.739984685495177E-14 -3.307107358861999E-14 -3.468894015059733E-12 3.806371455086981E-11 -2.811029235089762E-11 -7.694208350244853E-12
peri 9.599937681570352E-15 -1.715755925847839E-14 4.263071093067876E-11 -2.811029235089762E-11 3.989637522138661E-11 4.863945508618309E-12
i 8.662332583940489E-16 -1.727278197463517E-15 -2.249333888681733E-12 -7.694208350244853E-12 4.863945508618309E-12 1.917120451610146E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.4   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. 2019-August); 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 Bull. 38, 212-213.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2016) Minor Planet Bull. 43, 306-309.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 311-319.]
[Aznar Macias, A.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).]
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: 2003-08-29

[ 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 0.451136462112211 0.451132842974701 0.451140081256106 33.8146038569676 33.814429193835 2419745.736846085 0.221122928043416 199.383202849234 13.0727418043362 25.2147980351686 2167489.94027111 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1920-Jun-12 20:58 < 00:01 Earth 0.444885845328845 0.444885106992591 0.444886583686343 24.6626518340374 24.6624089907325 2422488.373399040 0.0854453581743376 166.387989023232 12.066634656605 77.9007869544966 5344740.17146267 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1933-Jun-15 06:29 < 00:01 Earth 0.44250690342486 0.442506464451624 0.442507342410799 22.2803714691633 22.2801012149253 2427238.769797070 0.0397887378018351 142.180210120333 11.8361330583757 -82.5321383868989 5556802.020322 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1946-Jun-16 00:15 < 00:01 Earth 0.491536616684184 0.491535692545339 0.491537540832027 20.6950308948347 20.6947689600656 2431987.510453437 0.0279059339950733 117.605803564539 11.5388500057669 -67.5915593968568 5914449.27668568 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1946-Nov-12 05:36 < 00:01 Earth 0.350649037554965 0.350646736312871 0.350651338813422 21.6421088822265 21.6417577718611 2432136.733008815 0.0956486008853513 166.261377505195 13.538701069277 -46.5541762278731 2934245.58757215 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1959-Nov-17 08:31 < 00:01 Earth 0.197423154583178 0.197421623617297 0.19742468556293 23.0737732434738 23.0731883171669 2436889.855038405 0.0832967915918695 113.108115629368 11.4726764540078 -47.8744015680187 1978100.02291067 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1972-Nov-21 21:30 < 00:01 Earth 0.102883754940815 0.102883524156884 0.102883985726951 25.1545136283949 25.1534840521494 2441643.395943863 0.0573766806359362 63.1543691823225 10.6323943766832 -85.9431015334969 1458874.94077519 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1985-Nov-27 21:43 < 00:01 Earth 0.183071332976448 0.183070676036782 0.183071989917675 27.8281447932282 27.8276217810037 2446397.404965324 0.0450246604876604 43.2496046225611 10.8468485314063 42.4126638103329 1754227.81008566 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
1998-Dec-04 16:31 < 00:01 Earth 0.337946665783712 0.337946179643268 0.337947151924311 31.1800946682845 31.1798418034003 2451152.188308339 0.0338904942555463 27.3450162775162 11.9878489256551 30.9844596653307 2641568.25220514 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2006-Jun-10 20:04 < 00:01 Earth 0.494839280952885 0.494838928787648 0.494839633118319 26.8141075666509 26.8139067561273 2453897.336186419 0.0297013127728297 28.1250047270013 12.1597666842339 60.0268396013055 5353749.41288352 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2019-Jun-14 06:02 < 00:01 Earth 0.450374097390764 0.450373834483889 0.450374360297742 23.998341482248 23.9980949578233 2458648.751708093 0.0302167802204141 33.6217700904261 12.2251186001176 81.3047916580853 5436742.60470892 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2032-Jun-15 03:21 < 00:01 Earth 0.458463414105087 0.458463108260099 0.458463719950753 21.8763603192697 21.8760946537194 2463398.639431643 0.0283553642323501 47.7986848097584 12.1094592335987 -78.4327191356163 5592708.19054486 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2032-Nov-08 20:12 < 00:01 Earth 0.469432038012238 0.469431084286642 0.469432991739167 21.1484123636772 21.1481439747364 2463545.341936114 0.0401360957502884 63.7415981206761 17.200398607884 -43.7464352542635 3004846.16088988 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2045-Nov-13 05:48 < 00:01 Earth 0.303696232681157 0.303694957410435 0.303697507957058 22.0426821785441 22.0422841516347 2468297.741815863 0.0568882229012693 90.0745212766912 12.5543967148118 -45.6586513106296 2713008.56149366 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2058-Nov-18 16:40 < 00:01 Earth 0.153292970913795 0.153291722817547 0.153294219026678 23.7672020409631 23.7664707019534 2473051.194637904 0.0800690509305429 102.057630817137 10.9604221171539 -52.8577109999732 1712008.54916888 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2071-Nov-24 07:51 < 00:01 Earth 0.115812308193247 0.115811451062282 0.115813165362698 26.0224076282013 26.0215234953218 2477804.827169670 0.105280837502378 116.689581528051 10.4663074588412 69.1099888719791 1553035.48671982 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2084-Nov-29 15:54 < 00:01 Earth 0.24012610974866 0.240123761682918 0.240128457826674 28.9689735672152 28.968590528444 2482559.162683944 0.143890646371593 145.277314532844 11.1568149497902 36.4212760710722 1898497.3205175 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2097-Dec-06 16:54 < 00:01 Earth 0.405200676749355 0.40519780480397 0.405203548700268 32.5562428413595 32.5560408609433 2487314.203947476 0.173716150141248 161.614043527777 12.5050169157842 27.6985535114503 2226888.09924636 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2105-Jun-12 18:59 < 00:01 Earth 0.484562351760909 0.484561336090247 0.484563367447243 25.8272700672475 25.8270571621918 2490058.291292392 0.0956801201911252 150.462743822632 12.3094085511193 70.8760297526608 5495971.39219874 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2118-Jun-15 18:08 < 00:01 Earth 0.456948506886274 0.456948262014296 0.456948751758251 23.1616624806651 23.1614107258847 2494809.255546913 0.0620410353590797 170.048905288666 12.2107452561407 -89.9890722671308 5606686.62346462 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2131-Jun-17 00:30 < 00:01 Earth 0.481825966443629 0.481824873933825 0.481827058978356 21.3354372594782 21.3351780664918 2499558.521119610 0.0287418835948578 185.40678485001 12.0466091210761 -73.310993434868 5782989.20961509 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2131-Nov-12 06:41 < 00:01 Earth 0.392342588969447 0.392338763645874 0.392346414329595 21.5119028520169 21.5115871544302 2499706.778408825 0.136565856239155 268.824601255242 14.3478021526615 -44.8798224148569 2980498.53210914 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2144-Nov-16 04:47 < 00:01 Earth 0.229993417869977 0.229989723645099 0.229997112161845 22.7669143720387 22.766405512841 2504459.699577346 0.179654464520102 269.059996196271 11.4773313363195 -46.8455486061462 2260961.67596115 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2157-Nov-21 17:04 < 00:01 Earth 0.114555579411502 0.114554221425715 0.114556937598762 24.7413812740364 24.740441160254 2509213.211408886 0.20733142661114 251.76504552822 10.4765533516059 -74.5744273545307 1597686.72996532 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2170-Nov-27 11:23 < 00:01 Earth 0.164489273025504 0.164485372126551 0.164493174041886 27.2477533758836 27.2471588800523 2513966.974575165 0.272230570644566 293.276791401499 10.5788589821272 48.4918230124193 1735018.30479853 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2183-Dec-04 06:30 < 00:01 Earth 0.319807556998627 0.319802169906817 0.319812944124377 30.5733506590671 30.5730781490111 2518721.770767832 0.320213556337956 314.978600812872 11.7014335490302 31.5002568662548 2101301.86490537 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
2196-Dec-10 09:55 < 00:01 Earth 0.488626270956453 0.488620447145917 0.488632094782932 34.3162044791121 34.3160455742074 2523476.912883658 0.353468651154552 322.079533708836 13.1410955909841 25.6444683546184 2355067.50937483 T 714 CATAB v2.0f-lin.ifort 2020-Aug-24 22:42:42 2020-Aug-24 22:42
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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