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18538 (1996 XY18)
Classification: Main-belt Asteroid          SPK-ID: 2018538
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1672507798613098 4.5177e-08  
a 2.446251668019637 1.9089e-08 AU
q 2.037114168806323 1.1201e-07 AU
i 2.900175030710982 6.6265e-06 deg
node 231.2549367329856 0.00013644 deg
peri 209.9379843076839 0.00013906 deg
M 249.2798149599492 2.84e-05 deg
tp 2457430.307937141387
(2016-Feb-11.80793714)
0.00011252 JED
period 1397.494569891918
3.83
1.6357e-05
4.478e-08
d
yr
n .2576038631962929 3.0152e-09 deg/d
Q 2.855389167232951 2.2281e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      795  
   data-arc span      6406 days (17.54 yr)  
   first obs. used      1996-12-06  
   last obs. used      2014-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57431  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:41:05  

Additional Information
 Earth MOID = 1.05314 AU 
 T_jup = 3.477 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4 mag n/a MPO266053  

18538 (1996 XY18)          Discovered 1996-Dec-06 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 XY18 = 1998 HO98 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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