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JPL Small-Body Database Browser
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20726 (1999 XE122)
Classification: Main-belt Asteroid          SPK-ID: 2020726
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1478399139316366 4.3002e-08  
a 2.465489436806702 1.1232e-08 au
q 2.10099169066984 1.0807e-07 au
i 10.86771563424306 4.5718e-06 deg
node 292.3249452603288 3.0945e-05 deg
peri 315.8205823426379 3.7312e-05 deg
M 161.1840420987091 2.2195e-05 deg
tp 2457967.399454144767
(2017-Aug-01.89945414)
8.5898e-05 TDB
period 1414.012166094631
3.87
9.6627e-06
2.646e-08
d
yr
n .2545946977205198 1.7398e-09 deg/d
Q 2.829987182943564 1.2893e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      8396 days (22.99 yr)  
   first obs. used      1996-12-11  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53027  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:46:20  

Additional Information
 Earth MOID = 1.10057 au 
 Jupiter MOID = 2.28827 au 
 T_jup = 3.448 
[ 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 14.3   n/a MPO492970  
diameter diameter 5.543 km 0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.127   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20726 (1999 XE122)          Discovered 1999-Dec-07 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XE122 = 1996 XX27 = 1998 MD27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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