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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 160 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4237015790317831 5.1603e-08  
a 2.103283117846907 1.1306e-08 AU
q 1.212118739664281 1.117e-07 AU
i 16.07496439539148 6.1937e-06 deg
node 121.696425395872 1.5352e-05 deg
peri 25.22540458542829 2.0965e-05 deg
M 170.9055706631239 2.5178e-05 deg
tp 2456471.569331803256
(2013-Jun-28.06933180)
7.3709e-05 JED
period 1114.153504838994
3.05
8.9837e-06
2.46e-08
d
yr
n .323115260542149 2.6054e-09 deg/d
Q 2.994447496029533 1.6097e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1123  
   data-arc span      9289 days (25.43 yr)  
   first obs. used      1989-03-10  
   last obs. used      2014-08-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60683  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-16 05:44:40  

Additional Information
 Earth MOID = .244685 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 14.7 mag n/a MPO302099  
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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 (391)
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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