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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 239 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4234192668758789 5.0325e-08  
a 2.103180129288249 1.3484e-08 au
q 1.212653140837102 1.1025e-07 au
i 16.07083384329064 5.3998e-06 deg
node 121.6733393470848 1.3505e-05 deg
peri 25.24463063785294 2.2209e-05 deg
M 328.0073737182326 3.546e-05 deg
tp 2458699.505774127656
(2019-Aug-04.00577413)		 0.00011068 TDB
period 1114.071673017618
3.05		 1.0714e-05
2.933e-08		 d
yr
n .3231389943026645 3.1076e-09 deg/d
Q 2.993707117739395 1.9193e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1478  
   data-arc span      10876 days (29.78 yr)  
   first obs. used      1989-03-10  
   last obs. used      2018-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52199  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jan-22 07:40:45  

Additional Information
 Earth MOID = .245362 au 
 Jupiter MOID = 2.072 au 
 T_jup = 3.581 
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[ 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-January); 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

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