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20680 (1999 VX9)
Classification: Main-belt Asteroid          SPK-ID: 2020680
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1055710082974924 3.3813e-08  
a 2.557359877713472 1.0993e-08 au
q 2.287376816843709 8.7866e-08 au
i 14.21957376160516 3.9782e-06 deg
node 122.6011172685733 1.3552e-05 deg
peri 16.58741397283794 2.2132e-05 deg
M 320.0707578335301 1.8527e-05 deg
tp 2459366.181784913614
(2021-May-31.68178491)
7.7278e-05 TDB
period 1493.778477443471
4.09
9.6312e-06
2.637e-08
d
yr
n .2409995895884927 1.5539e-09 deg/d
Q 2.827342938583235 1.2153e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1979  
   data-arc span      12173 days (33.33 yr)  
   first obs. used      1987-11-15  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42289  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:26:26  

Additional Information
 Earth MOID = 1.30449 au 
 Jupiter MOID = 2.22348 au 
 T_jup = 3.386 
[ 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 13.2   n/a MPO502322  
diameter diameter 5.795 km 0.270 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.332   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20680 (1999 VX9)          Discovered 1999-Nov-09 by Juels, C. W. at Fountain Hills
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VX9 = 1994 ND2 = 1998 MX29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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