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39664 (1995 WW4)
Classification: Main-belt Asteroid          SPK-ID: 2039664
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0496424129557914 7.2179e-08  
a 2.726670442130566 1.7878e-08 au
q 2.59131194204797 2.0246e-07 au
i 1.277519618858411 4.6928e-06 deg
node 278.3916589270639 0.00027161 deg
peri 252.6304852810399 0.00027619 deg
M 52.53600502143688 4.8534e-05 deg
tp 2458760.505136760285
(2019-Oct-04.00513676)
0.00022166 TDB
period 1644.551212659651
4.50
1.6175e-05
4.428e-08
d
yr
n .2189047061768237 2.153e-09 deg/d
Q 2.862028942213162 1.8766e-08 au
  Orbit Determination Parameters
   # obs. used (total)      625  
   data-arc span      10257 days (28.08 yr)  
   first obs. used      1991-12-31  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56523  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:32:49  

Additional Information
 Earth MOID = 1.59687 au 
 Jupiter MOID = 2.1059 au 
 T_jup = 3.354 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO279916  

39664 (1995 WW4)          Discovered 1995-Nov-20 by Niijima, T., Urata, T. at Ojima
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WW4 = 2000 YY131 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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