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2813 Zappala (1981 WZ)
Classification: Main-belt Asteroid          SPK-ID: 2002813
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1533409652318883 4.001e-08  
a 3.133654208234919 1.9811e-08 au
q 2.653136647241208 1.2734e-07 au
i 14.76444495169375 4.4631e-06 deg
node 231.7754511234421 1.9216e-05 deg
peri 247.6247621818709 2.6064e-05 deg
M 207.4071218780949 2.0271e-05 deg
tp 2459459.329191522691
(2021-Sep-01.82919152)
0.00011877 TDB
period 2026.166048858248
5.55
1.9214e-05
5.261e-08
d
yr
n .1776754675180059 1.6849e-09 deg/d
Q 3.61417176922863 2.2848e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2216  
   data-arc span      25820 days (70.69 yr)  
   first obs. used      1949-03-29  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42749  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:20:41  

Additional Information
 Earth MOID = 1.71115 au 
 Jupiter MOID = 1.82813 au 
 T_jup = 3.144 
[ 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 10.9   n/a MPO347542  
diameter diameter 32.040 km 0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.231 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Franco, L.; Klinglesmith III, D.A.; Marchini, A. (2016) Minor Planet Bull. 43, 203-204.]
geometric albedo albedo 0.044   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B T   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)

2813 Zappala (1981 WZ)          Discovered 1981-Nov-24 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 WZ = 1931 VZ = 1949 FC = 1964 TH = 1979 OS14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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