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20903 (2000 XH9)
Classification: Main-belt Asteroid          SPK-ID: 2020903
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1850311983845821 1.6304e-08  
a 2.584781364053976 1.0621e-08 au
q 2.106516170700934 4.0334e-08 au
i 14.19587523270426 1.0151e-06 deg
node 53.26001845368008 1.2796e-06 deg
peri 289.2081369192839 6.7148e-06 deg
M 40.59870910417855 5.6155e-06 deg
tp 2459029.323606673771
(2020-Jun-28.82360667)
2.3567e-05 TDB
period 1517.868497722752
4.16
9.3555e-06
2.561e-08
d
yr
n .237174696319283 1.4618e-09 deg/d
Q 3.063046557407018 1.2586e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2231  
   data-arc span      12158 days (33.29 yr)  
   first obs. used      1987-11-23  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:34:12  

Additional Information
 Earth MOID = 1.14769 au 
 Jupiter MOID = 2.51713 au 
 T_jup = 3.356 
[ 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 13.68   n/a E2021B10  
diameter diameter 4.234 km 0.495 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.472   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20903 (2000 XH9)          Discovered 2000-Dec-01 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 XH9 = 1987 WP3 = 1996 CH7 = 1998 HN105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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