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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1670906413977745 4.4669e-08  
a 2.445680057493318 1.3625e-08 au
q 2.037029808033013 1.1172e-07 au
i 2.900568844922661 6.3114e-06 deg
node 231.2448083584432 9.602e-05 deg
peri 210.0093976927586 9.8484e-05 deg
M 352.2680320812588 1.9509e-05 deg
tp 2457430.504433597879
(2016-Feb-12.00443360)
7.5682e-05 JED
period 1397.004774043982
3.82
1.1674e-05
3.196e-08
d
yr
n .2576941802123478 2.1534e-09 deg/d
Q 2.854330306953622 1.5902e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1061  
   data-arc span      6949 days (19.03 yr)  
   first obs. used      1996-12-06  
   last obs. used      2015-12-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54109  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:40:01  

Additional Information
 Earth MOID = 1.0528 au 
 Jupiter MOID = 2.38822 au 
 T_jup = 3.478 
[ 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 14.6 mag n/a MPO358809  

18538 (1996 XY18)          Discovered 1996-Dec-06 by Shimizu, Y., Urata, T. at Nachi-Katsuura
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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