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20705 (1999 WH3)
Classification: Main-belt Asteroid          SPK-ID: 2020705
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05243316146571667 9.9965e-09  
a 2.974473189438947 1.2381e-08 au
q 2.81851215642165 2.8644e-08 au
i 14.07655160534093 6.3026e-07 deg
node 64.54637972039374 3.3239e-06 deg
peri 23.26336417671957 2.8933e-05 deg
M 23.50020669975054 2.6191e-05 deg
tp 2459078.184161620030
(2020-Aug-16.68416162)
0.00013626 TDB
period 1873.758064317647
5.13
1.1699e-05
3.203e-08
d
yr
n .1921272585055416 1.1996e-09 deg/d
Q 3.130434222456245 1.303e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2571  
   data-arc span      25877 days (70.85 yr)  
   first obs. used      1950-05-10  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45214  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:27:32  

Additional Information
 Earth MOID = 1.83805 au 
 Jupiter MOID = 2.12339 au 
 T_jup = 3.214 
[ 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 12.90   n/a E2021B10  
diameter diameter 14.290 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.1953 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.094   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20705 (1999 WH3)          Discovered 1999-Nov-18 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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