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JPL Small-Body Database Browser
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20704 (1999 WH)
Classification: Main-belt Asteroid          SPK-ID: 2020704
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08588692397826021 3.083e-08  
a 2.991309038526656 1.6546e-08 au
q 2.734394706539235 9.0564e-08 au
i 11.24312316125794 4.2219e-06 deg
node 53.88331186928011 1.7235e-05 deg
peri 234.3971355994644 3.0392e-05 deg
M 58.48332297946649 2.584e-05 deg
tp 2458293.513065640027
(2018-Jun-24.01306564)		 0.0001355 TDB
period 1889.689072701838
5.17		 1.5678e-05
4.292e-08		 d
yr
n .190507531212677 1.5806e-09 deg/d
Q 3.248223370514078 1.7967e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2294  
   data-arc span      24023 days (65.77 yr)  
   first obs. used      1954-02-26  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44776  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:46:00  

Additional Information
 Earth MOID = 1.73563 au 
 Jupiter MOID = 1.88354 au 
 T_jup = 3.221 
[ 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 12.2   n/a MPO333010  
diameter diameter 11.820 km 0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.200   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20704 (1999 WH)          Discovered 1999-Nov-16 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 WH = 1980 BE2 = 1983 YR 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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