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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 268 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4234747640797994 4.0674e-08  
a 2.103979839100151 1.0723e-08 au
q 1.21299747310856 8.7747e-08 au
i 16.07356216509023 5.1234e-06 deg
node 121.6660620532274 1.1731e-05 deg
peri 25.30521008342521 1.9971e-05 deg
M 97.17949522936199 3.018e-05 deg
tp 2458699.592559940182
(2019-Aug-04.09255994)
9.1173e-05 TDB
period 1114.707152634031
3.05
8.5215e-06
2.333e-08
d
yr
n .3229547770904018 2.4689e-09 deg/d
Q 2.994962205091741 1.5264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1604  
   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      .51801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-05 10:16:24  

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 14.75   n/a E2021B10  
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. 2020-October); 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 0.355533256115275 0.35552704990667 0.355539462367735 10.9259731633759 10.9252872241644 2425282.845317458 0.19449172360487 366.932134867798 15.5662738030116 -32.5339000922259 1649199.82755513 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
1931-Feb-02 22:27 < 00:01 Earth 0.238014178512731 0.238013821711907 0.23801453537349 9.04707296423224 9.04583550432354 2426375.435725239 0.180002772893162 262.906881589052 12.3841403694004 87.209049843035 2579085.28211342 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
1934-Jan-26 14:20 < 00:01 Earth 0.377757585579218 0.377752254781026 0.377762916377454 8.86031084977691 8.85951474594315 2427464.097215384 0.453137839381009 265.933509746734 66.1966219040601 1.69898511250396 209603.779235357 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
1989-Feb-09 13:39 < 00:01 Earth 0.435476435258416 0.435475866566874 0.435477003950032 11.2721302266368 11.271587411241 2447567.068565066 0.101556279530459 30.8071051778414 17.7962839323872 -28.6042977076105 2082675.15618766 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
1992-Feb-04 08:37 < 00:01 Earth 0.250169702778728 0.250169419342603 0.250169986215011 9.03333235505066 9.03215323506605 2448656.859282067 0.045593079513746 23.8621119341216 12.1008411633948 69.1992366687631 2616687.28051355 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
1995-Jan-25 22:34 < 00:01 Earth 0.389483505839585 0.389482984086793 0.38948402759789 8.67744954122016 8.67666113340781 2449743.440088590 0.0486911315059202 93.6263927598515 15.1957078659477 76.785240296248 3128551.04907657 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2050-Feb-09 01:47 < 00:01 Earth 0.482292909745603 0.482285835189823 0.482299984321067 12.4548870020805 12.4544434246699 2469846.573976344 0.263558368623019 384.820398540851 16.1767767391141 -23.5718067370155 1740688.53626023 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2053-Feb-05 01:01 < 00:01 Earth 0.271932761117519 0.271928826105018 0.271936696263712 9.75891029439903 9.75790620625021 2470938.542187241 0.103663555363827 359.688121769972 14.0383432602272 -57.0086787704535 2132992.9830376 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2056-Feb-01 12:24 < 00:01 Earth 0.282016779500848 0.282011958284486 0.28202160077574 8.67019435354485 8.66910458098188 2472030.016900763 0.301160603225568 314.51953992532 10.7150829132753 40.1746653697756 3281970.63835755 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2111-Feb-10 20:22 < 00:01 Earth 0.422271328633844 0.422258086756164 0.422284570638815 11.3243392243687 11.3237820147862 2492127.348860537 0.497523763410209 754.834813212791 15.2951901540962 -28.9902306234211 1850674.67876129 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2114-Feb-05 12:23 < 00:01 Earth 0.250194712428757 0.250193618584441 0.250195806887332 8.95093694587988 8.94974708934994 2493218.015659997 0.378891025778991 637.831671167304 12.6311921894009 -85.2278746290959 2583654.93644814 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2117-Jan-27 04:12 00:01 Earth 0.38910782165202 0.389095073675284 0.38912057008479 8.59834498929978 8.59754855923946 2494304.674718463 1.12476246926453 920.285543937756 37.2789698570828 46.3586119447207 1101604.43387284 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2175-Feb-09 03:14 < 00:01 Earth 0.360618897233308 0.36059958516939 0.36063820983081 10.8923751157956 10.8916967642637 2515501.634934257 0.433946367483459 1185.763335313 14.5445006235557 -35.7001281789542 1932222.48368404 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2178-Feb-04 21:12 < 00:01 Earth 0.2541225024484 0.25411694977512 0.254128056465935 8.64800415332578 8.64679164762168 2516593.383569467 0.738013951955674 963.017445682613 10.2297779202161 73.2971139709642 3296551.32412473 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16
2181-Jan-24 13:32 00:02 Earth 0.432260585814506 0.432239973951099 0.432281204072142 8.46885365721416 8.46812577559153 2517678.064225572 2.20475391291182 2816.83459630479 25.5705441798815 68.6016741871143 2068056.40839126 T 268 CATAB v2.0f-lin.ifort 2020-Dec-05 10:16:28 2020-Dec-05 10:16

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