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JPL Small-Body Database Browser
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20708 (1999 XH1)
Classification: Main-belt Asteroid          SPK-ID: 2020708
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04829254685132364 4.2196e-08  
a 2.987978523615146 1.8553e-08 au
q 2.843681430772713 1.2423e-07 au
i 11.1328445835914 4.3942e-06 deg
node 79.69470716180579 2.0398e-05 deg
peri 130.9692051626531 4.49e-05 deg
M 153.2479413319027 4.1197e-05 deg
tp 2457797.423749504668
(2017-Feb-12.92374950)
0.00021415 TDB
period 1886.533989726973
5.17
1.7571e-05
4.811e-08
d
yr
n .1908261404037044 1.7773e-09 deg/d
Q 3.132275616457579 1.9449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2448  
   data-arc span      11351 days (31.08 yr)  
   first obs. used      1988-11-04  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43634  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:46:21  

Additional Information
 Earth MOID = 1.84802 au 
 Jupiter MOID = 1.89565 au 
 T_jup = 3.227 
[ 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 12.7   n/a MPO452463  
diameter diameter 9.661 km 0.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.249   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20708 (1999 XH1)          Discovered 1999-Dec-02 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XH1 = 1988 VE13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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