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18538 (1996 XY18)
Classification: Main-belt Asteroid          SPK-ID: 2018538
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .168773448657981 3.7321e-08  
a 2.445089390530558 9.242e-09 au
q 2.032423221813675 9.1831e-08 au
i 2.904926459575036 4.7307e-06 deg
node 231.1900136560879 6.5302e-05 deg
peri 210.0132380734656 6.6669e-05 deg
M 96.11570560314367 1.2042e-05 deg
tp 2458827.651503245709
(2019-Dec-10.15150325)
4.644e-05 TDB
period 1396.498709438334
3.82
7.9178e-06
2.168e-08
d
yr
n .2577875636883263 1.4616e-09 deg/d
Q 2.857755559247441 1.0802e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1629  
   data-arc span      8865 days (24.27 yr)  
   first obs. used      1996-12-06  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5136  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:31:19  

Additional Information
 Earth MOID = 1.04841 au 
 Jupiter MOID = 2.3783 au 
 T_jup = 3.478 
[ 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 14.61   n/a E2021B10  
diameter diameter 5.701 km 1.285 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.089   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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