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20737 (1999 XJ189)
Classification: Main-belt Asteroid          SPK-ID: 2020737
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06186106949873978 4.7916e-08  
a 3.034402447152834 1.6975e-08 au
q 2.846691066482367 1.4826e-07 au
i 10.14517155251018 4.9867e-06 deg
node 44.80608277649507 2.1798e-05 deg
peri 126.6460286270662 3.7477e-05 deg
M 267.6607743713016 3.0713e-05 deg
tp 2459695.712871390786
(2022-Apr-26.21287139)
0.0001658 TDB
period 1930.670660132501
5.29
1.6201e-05
4.436e-08
d
yr
n .1864637027090334 1.5647e-09 deg/d
Q 3.222113827823302 1.8025e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1940  
   data-arc span      20815 days (56.99 yr)  
   first obs. used      1964-03-11  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48659  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:29:31  

Additional Information
 Earth MOID = 1.8627 au 
 Jupiter MOID = 1.76837 au 
 T_jup = 3.215 
[ 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 13.26   n/a E2021B10  
diameter diameter 7.362 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.188   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20737 (1999 XJ189)          Discovered 1999-Dec-12 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XJ189 = 1964 EW = 1990 CM = 1993 TY32 = 1998 US32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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