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JPL Small-Body Database Browser
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20734 (1999 XA169)
Classification: Main-belt Asteroid          SPK-ID: 2020734
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1967777500554411 4.3396e-08  
a 3.09380497162031 2.9643e-08 au
q 2.485012990194527 1.3603e-07 au
i 25.07114602652944 4.8934e-06 deg
node 71.62752792037996 1.1732e-05 deg
peri 225.5010595293523 1.9262e-05 deg
M 334.4501582388903 1.8963e-05 deg
tp 2458741.566386045057
(2019-Sep-15.06638604)
0.00010536 TDB
period 1987.640450028953
5.44
2.8567e-05
7.821e-08
d
yr
n .1811192763735292 2.6031e-09 deg/d
Q 3.702596953046092 3.5476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1523  
   data-arc span      15231 days (41.70 yr)  
   first obs. used      1977-12-07  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45097  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:30:31  

Additional Information
 Earth MOID = 1.52097 au 
 Jupiter MOID = 1.59433 au 
 T_jup = 3.051 
[ 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 12.4   n/a MPO449104  
diameter diameter 23.992 km 0.631 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20734 (1999 XA169)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XA169 = 1977 XD2 = 1986 LZ = 1997 LX17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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