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JPL Small-Body Database Browser
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20728 (1999 XD143)
Classification: Main-belt Asteroid          SPK-ID: 2020728
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1748172724282637 3.5197e-08  
a 2.218415509865476 6.3017e-09 au
q 1.830598161318238 7.6125e-08 au
i 4.763881399550736 3.8142e-06 deg
node 175.8858374228577 4.2544e-05 deg
peri 202.8551027304835 4.3934e-05 deg
M 328.6131038125441 1.0483e-05 deg
tp 2458705.722504935973
(2019-Aug-10.22250494)
3.5171e-05 TDB
period 1206.876320318967
3.30
5.1425e-06
1.408e-08
d
yr
n .2982907145819673 1.271e-09 deg/d
Q 2.606232858412715 7.4034e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1552  
   data-arc span      23067 days (63.15 yr)  
   first obs. used      1956-10-11  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5022  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:46:20  

Additional Information
 Earth MOID = .832621 au 
 Jupiter MOID = 2.85134 au 
 T_jup = 3.627 
[ 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 14.7   n/a MPO502322  
diameter diameter 3.318 km 0.439 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.306   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20728 (1999 XD143)          Discovered 1999-Dec-14 by Juels, C. W. at Fountain Hills
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XD143 = 1956 TS = 1998 HK82 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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