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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1671472138399632 4.4402e-08  
a 2.445949499895592 1.322e-08 au
q 2.037115855794792 1.1077e-07 au
i 2.900507674525715 5.8418e-06 deg
node 231.2399406052594 8.4721e-05 deg
peri 210.0539699640802 8.7471e-05 deg
M 43.77105850516902 1.8234e-05 deg
tp 2457430.615324670004
(2016-Feb-12.11532467)
7.1037e-05 JED
period 1397.235643994675
3.83
1.1328e-05
3.101e-08
d
yr
n .2576516005351578 2.0889e-09 deg/d
Q 2.854783143996392 1.543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1166  
   data-arc span      7058 days (19.32 yr)  
   first obs. used      1996-12-06  
   last obs. used      2016-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54732  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:30:10  

Additional Information
 Earth MOID = 1.05184 au 
 Jupiter MOID = 2.3862 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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