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5751 Zao (1992 AC)
Classification: Amor [NEO]          SPK-ID: 2005751
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 267 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4234747647345752 4.0692e-08  
a 2.103979838948581 1.0727e-08 au
q 1.212997471643541 8.7789e-08 au
i 16.07356215701843 5.1235e-06 deg
node 121.6660621995896 1.1737e-05 deg
peri 25.30520976706081 1.9977e-05 deg
M 97.17949568675434 3.0193e-05 deg
tp 2458699.592558556424
(2019-Aug-04.09255856)
9.1211e-05 TDB
period 1114.707152513576
3.05
8.5253e-06
2.334e-08
d
yr
n .3229547771253001 2.47e-09 deg/d
Q 2.994962206253621 1.527e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1601  
   data-arc span      11464 days (31.39 yr)  
   first obs. used      1989-03-10  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51828  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-30 07:23:09  

Additional Information
 Earth MOID = .245382 au 
 Jupiter MOID = 2.06936 au 
 T_jup = 3.580 
[ show covariance matrix ]

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 14.8   n/a MPO458888  
diameter diameter 2.3 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
rotation period rot_per 76. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1995) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.36   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
SMASSII spectral type spec_B X   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)

5751 Zao (1992 AC)          Discovered 1992-Jan-05 by Koishikawa, M. at Ayashi
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
1928-Feb-06 08:17 < 00:01 Earth 0.355533220071857 0.355527010821489 0.355539429366121 10.9259727670531 10.9252868277473 2425282.845316635 0.194600991944709 367.106619723659 15.569429005455 -32.5325682367838 1648933.38689842 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
1931-Feb-02 22:27 < 00:01 Earth 0.238014178900447 0.23801382208382 0.238014535777036 9.04707278998678 9.04583533005626 2426375.435725005 0.180084130763713 263.030196430567 12.3868148830049 87.2106861419774 2578747.02287779 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
1934-Jan-26 14:20 < 00:01 Earth 0.377757615621198 0.37775228233521 0.377762948907229 8.86031085075212 8.85951474698176 2427464.097212972 0.453332338893159 266.056896201628 66.2132626266763 1.69338099939799 209496.91463983 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
1989-Feb-09 13:39 < 00:01 Earth 0.435476432579228 0.435475863752508 0.435477001406022 11.2721304515724 11.2715876361841 2447567.068563725 0.101598725328422 30.8097749669064 17.8052474158877 -28.5846223125502 2082111.62821438 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
1992-Feb-04 08:37 < 00:01 Earth 0.25016970093556 0.250169417340806 0.25016998453047 9.03333237777319 9.03215325778286 2448656.859281820 0.0456057163765075 23.8663773999926 12.1056209335688 69.1794781316232 2615764.60456623 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
1995-Jan-25 22:34 < 00:01 Earth 0.389483503943986 0.389482982034735 0.389484025858749 8.6774495415058 8.67666113368965 2449743.440088433 0.0487100204448768 93.6723280021226 15.1976802182493 76.7867523422797 3128000.14387917 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2050-Feb-09 01:47 < 00:01 Earth 0.482292943314376 0.48228586547648 0.482300021171957 12.4548876039875 12.4544440266292 2469846.573975947 0.263616310796231 385.002925147212 16.1800115995187 -23.5731609659464 1740531.74255792 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2053-Feb-05 01:01 < 00:01 Earth 0.271932778863978 0.27192884212739 0.271936715734382 9.75891066147683 9.75790657343132 2470938.542187221 0.103697100583322 359.857317510788 14.0410356252899 -57.0098465887367 2132787.9127627 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2056-Feb-01 12:24 < 00:01 Earth 0.282016756033422 0.282011932448221 0.282021579677184 8.67019437777736 8.66910460512675 2472030.016902404 0.301315233187839 314.672702656988 10.717148933356 40.174352261414 3280517.16314797 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2111-Feb-10 20:22 < 00:01 Earth 0.422271376235378 0.42225812813228 0.422284624465897 11.3243399793296 11.3237827698471 2492127.348860453 0.497719689610804 755.194254109377 15.2981123878032 -28.9908529220009 1850500.49486611 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2114-Feb-05 12:23 < 00:01 Earth 0.250194715004344 0.250193620789707 0.250195809833838 8.95093718435685 8.94974732787086 2493218.015661135 0.379070196775675 638.134359403962 12.6335227999771 -85.2284831537911 2583412.33577542 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2117-Jan-27 04:12 00:01 Earth 0.389107777890076 0.389095023861129 0.389120532375522 8.59834497214497 8.59754854199348 2494304.674720585 1.12531080728348 920.734460679752 37.2879007573441 46.3593017126406 1101308.25638211 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2175-Feb-09 03:14 < 00:01 Earth 0.360618923324488 0.360599602159258 0.360638245023815 10.8923754680865 10.8916971166257 2515501.634934721 0.434122311277819 1186.32774945085 14.5473895646756 -35.7005020049534 1932013.85873808 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2178-Feb-04 21:12 < 00:01 Earth 0.254122493990484 0.254116938551987 0.254128050774521 8.64800423474534 8.64679172901229 2516593.383570427 0.738370080215638 963.477491485606 10.2317580036471 73.2967578496452 3296146.4421777 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23
2181-Jan-24 13:32 00:02 Earth 0.432260561020116 0.432239939343405 0.432281189097272 8.46885360080417 8.46812571913493 2517678.064225563 2.20581911885319 2818.20001655421 25.5779733844806 68.60186403125 2067415.09051577 T 267 CATAB v2.0f-lin.ifort 2020-Jul-30 07:23:25 2020-Jul-30 07:23

Alternate Designations
 1992 AC = 1989 EN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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