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5751 Zao (1992 AC)
Classification: Amor [NEO]          SPK-ID: 2005751
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 191 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4237761400691893 5.0613e-08  
a 2.10291220392788 1.1043e-08 au
q 1.211748187242931 1.0975e-07 au
i 16.07394054686661 5.3523e-06 deg
node 121.6911926206812 1.5051e-05 deg
peri 25.25879919713245 2.0688e-05 deg
M 300.1201442530807 2.5734e-05 deg
tp 2457585.771400145256
(2016-Jul-16.27140015)
8.1069e-05 JED
period 1113.858796423762
3.05
8.7736e-06
2.402e-08
d
yr
n .3232007514380124 2.5458e-09 deg/d
Q 2.994076220612829 1.5722e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1258  
   data-arc span      9792 days (26.81 yr)  
   first obs. used      1989-03-10  
   last obs. used      2015-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58736  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:57:29  

Additional Information
 Earth MOID = .244159 au 
 Jupiter MOID = 2.07687 au 
 T_jup = 3.581 
[ 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 14.8 mag n/a MPO358686  
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. 2015-December); 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: 2013-09-05

[ show close-approach data ]
Alternate Designations
 1992 AC = 1989 EN1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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