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20718 (1999 XZ97)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020718
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1197155019873772 1.4366e-08  
a 3.423068109766644 2.0482e-08 au
q 3.013273792668948 4.8327e-08 au
i 11.89458553091416 5.9241e-07 deg
node 76.53843027599537 1.8968e-06 deg
peri 157.1665726141956 9.2163e-06 deg
M 323.3221558806019 7.5949e-06 deg
tp 2459436.180167029985
(2021-Aug-09.68016703)
4.9745e-05 TDB
period 2313.24556194191
6.33
2.0762e-05
5.684e-08
d
yr
n .1556255012104246 1.3968e-09 deg/d
Q 3.832862426864341 2.2934e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2144  
   data-arc span      12554 days (34.37 yr)  
   first obs. used      1986-10-31  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44401  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:28:25  

Additional Information
 Earth MOID = 2.00412 au 
 Jupiter MOID = 1.21016 au 
 T_jup = 3.096 
[ 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 12.3   n/a MPO435892  
diameter diameter 23.030 km 0.274 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20718 (1999 XZ97)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XZ97 = 1998 UG24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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