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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 346 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5382990848264381 3.9574e-08  
a 1.893913502809542 2.5188e-09 AU
q .8744215975067319 7.5048e-08 AU
i 41.18736919800617 5.3565e-06 deg
node 63.55627242665145 7.3436e-06 deg
peri 293.0560894026011 7.2417e-06 deg
M 67.67116264001092 5.9868e-06 deg
tp 2456821.546673915002
(2014-Jun-13.04667391)
1.5621e-05 JED
period 952.0037025713614
2.61
1.8992e-06
5.2e-09
d
yr
n .3781497897830021 7.5439e-10 deg/d
Q 2.913405408112352 3.8747e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2438  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      21984 days (60.19 yr)  
   first obs. used      1955-01-26  
   last obs. used      2015-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46833  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-22 06:18:39  

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-Feb); 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.]
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 0.4511357381087 0.451131838888239 0.451139637329265 33.8145854097237 33.8144107462155 2419745.736810822 0.0679429560440095 192.626145261146 11.3130934667905 9.44861031376818 985810.377583081 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1920-Jun-12 20:58 < 00:01 Earth 0.44488591923507 0.444885103489501 0.44488673500563 24.6626598079122 24.6624169647261 2422488.373387110 0.0316946232948687 164.707718947914 12.3844700402175 75.4132941660021 4739868.92461709 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1933-Jun-15 06:29 < 00:01 Earth 0.442506789501263 0.442506322524471 0.442507256494041 22.2803749970862 22.2801047428215 2427238.769791730 0.0176901848909443 133.623138289848 11.7460723561578 -84.8346481750929 5019682.91203402 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1946-Jun-16 00:15 < 00:01 Earth 0.491536434964307 0.49153544144116 0.491537428497385 20.6950313558169 20.6947694209568 2431987.510451777 0.0140701010165371 104.871006886303 11.2107342240509 -68.822153629864 5389212.93758131 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1946-Nov-12 05:36 < 00:01 Earth 0.350649456503701 0.350647019477729 0.350651893531398 21.6421033961262 21.6417522860913 2432136.732990479 0.0309786919852258 109.446072438451 12.6217834631872 -14.280431565695 1000171.4431585 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1959-Nov-17 08:31 < 00:01 Earth 0.197423412962622 0.197421807980715 0.197425017948955 23.0737673146654 23.0731823889737 2436889.855022599 0.0297086675736124 81.3602380329915 12.1943267112806 -29.8448841170724 1121286.5917442 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1972-Nov-21 21:30 < 00:01 Earth 0.102883758946175 0.102883474474798 0.102884043419104 25.1545085431505 25.153478966737 2441643.395931760 0.0207726784556313 49.3517730853655 11.9140598045809 -84.666604701361 1175828.82086042 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1985-Nov-27 21:43 < 00:01 Earth 0.183071219445017 0.183070598128681 0.183071840761978 27.8281404330525 27.8276174204218 2446397.404955663 0.0154591842833574 34.3009291955403 11.6451417506973 33.8413004604328 1362352.07578208 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
1998-Dec-04 16:31 < 00:01 Earth 0.337946591665919 0.33794611773537 0.337947065596423 31.1800913488026 31.179838483836 2451152.188300407 0.011377113958674 23.6699058681 11.3498179844394 18.4960920797626 2325319.58402364 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2006-Jun-10 20:04 < 00:01 Earth 0.494839240879222 0.494838826298536 0.494839655459954 26.8141060985817 26.8139052880308 2453897.336183919 0.0107086234335077 31.7908434492276 12.8753705004118 58.8452267754516 4677282.44519432 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2019-Jun-14 06:02 < 00:01 Earth 0.450374044407821 0.450373742793905 0.450374346022056 23.9983384769151 23.9980919524306 2458648.751707694 0.0122319006926632 39.2707351934795 12.4738897575723 79.6027906914606 4826176.23298405 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2032-Jun-15 03:21 < 00:01 Earth 0.458463400205398 0.458463037926317 0.458463762486364 21.8763567862624 21.8760911206612 2463398.639430222 0.0129858447356503 52.2262125367027 11.9612824694223 -80.4137237420675 5041203.93141712 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2032-Nov-08 20:12 < 00:01 Earth 0.469431948051977 0.469430728824778 0.469433167279395 21.148409884482 21.1481414954584 2463545.341931792 0.0133129523726509 54.1842485113546 12.8719406637129 -12.0128176698681 1505321.18738918 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2045-Nov-13 05:48 < 00:01 Earth 0.303696090390671 0.303694505047403 0.303697675735172 22.0426806345269 22.0422826074031 2468297.741813988 0.0220758395013313 73.0755110035641 12.3636991527606 -18.9982930629545 1189069.43240279 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2058-Nov-18 16:40 < 00:01 Earth 0.153292800213717 0.153291285237848 0.153294315201823 23.7672022742655 23.7664709344486 2473051.194639216 0.0326107484706749 91.0721612961634 12.003472290188 -42.8330354627324 1187343.07070604 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2071-Nov-24 07:51 < 00:01 Earth 0.115812408486014 0.115811358143846 0.11581345886688 26.0224097774675 26.0215256454267 2477804.827173435 0.0419725798944702 111.913056337791 11.7293245523713 64.5953988112469 1227539.2111658 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2084-Nov-29 15:54 < 00:01 Earth 0.240126403956237 0.240123593033305 0.240129214884909 28.9689780615247 28.9685950232822 2482559.162691621 0.0537111691731866 146.104467920804 11.5007042971123 24.091232271413 1207741.78238983 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2097-Dec-06 16:54 < 00:01 Earth 0.405201057591036 0.405197648071137 0.405204467111497 32.5562498448655 32.5560478646826 2487314.203958804 0.0586764473326993 168.940089785783 11.2451753139408 12.0732532923045 1116654.2053876 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2105-Jun-12 18:59 < 00:01 Earth 0.484562160217371 0.48456097063913 0.484563349817354 25.8272603855996 25.8270474803799 2490058.291299700 0.0342966884033139 164.305081948409 12.7879914695105 68.6752010349138 4850191.37892559 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2118-Jun-15 18:08 < 00:01 Earth 0.456948459983441 0.456948222899767 0.4569486970638 23.1616536288968 23.1614018739943 2494809.255550826 0.0250586565672938 176.484681993935 12.24297792176 87.6272721746188 5026683.8460472 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2131-Jun-17 00:30 < 00:01 Earth 0.481826084505818 0.481824811645282 0.481827357399752 21.3354300944572 21.3351709014472 2499558.521118708 0.0136923842896705 182.586764099313 11.7747176555723 -75.045008749891 5242580.8496647 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2131-Nov-12 06:41 < 00:01 Earth 0.39234207168939 0.392337588112741 0.392346555270945 21.5119026886736 21.5115869906682 2499706.778415089 0.0469467432309825 201.446167778479 12.5810272861812 -14.0835487708888 1038290.95293083 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2144-Nov-16 04:47 < 00:01 Earth 0.229992917682669 0.229988605019551 0.229997230369562 22.766917145488 22.7664082852456 2504459.699587326 0.0690551336333943 213.370535658403 12.0985518074861 -27.2403419159176 1175727.88303181 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2157-Nov-21 17:04 < 00:01 Earth 0.114555394289798 0.114553824211747 0.114556964554115 24.7413864823084 24.7404463672046 2509213.211420863 0.0815927736349158 223.125879348968 11.7688668361059 -72.1436474891075 1263418.7407862 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2170-Nov-27 11:23 < 00:01 Earth 0.164489752287055 0.164485196603404 0.164494308057709 27.247762565472 27.2471680715734 2513966.974593338 0.103675943797294 278.475031336027 11.5436837634821 39.853921687498 1265419.10431264 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2183-Dec-04 06:30 < 00:01 Earth 0.319808204418792 0.319801931171243 0.31981447767525 30.5733629704299 30.5730904610353 2518721.770789837 0.112688784971708 315.320522849 11.3098934890751 17.3790744620389 1194337.01030155 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
2196-Dec-10 09:55 < 00:01 Earth 0.488626939625297 0.488620166298306 0.488633712952687 34.3162185233959 34.3160596187737 2523476.912907166 0.112021426628599 335.284808122176 11.0786805779391 9.44675162941058 1049547.45401707 T 346 CATAB v2.0c-linF95 2015-Apr-22 06:18:59 2015-Apr-22 06:19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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