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18385 (1992 EG31)
Classification: Main-belt Asteroid          SPK-ID: 2018385
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09729775736893935 4.2311e-08  
a 3.037123570508134 1.9351e-08 au
q 2.741618258245347 1.325e-07 au
i 10.45078660441951 4.5317e-06 deg
node 162.5246212527534 2.2378e-05 deg
peri 182.0120506351849 3.0798e-05 deg
M 337.9290674746341 2.3323e-05 deg
tp 2459319.025092405301
(2021-Apr-14.52509241)
0.0001258 TDB
period 1933.268257554092
5.29
1.8477e-05
5.059e-08
d
yr
n .1862131644655772 1.7797e-09 deg/d
Q 3.332628882770921 2.1234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1300  
   data-arc span      11285 days (30.90 yr)  
   first obs. used      1989-10-03  
   last obs. used      2020-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53605  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:15:19  

Additional Information
 Earth MOID = 1.73218 au 
 Jupiter MOID = 2.08055 au 
 T_jup = 3.209 
[ 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 13.84   n/a E2021B10  
diameter diameter 5.626 km 0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.222   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18385 (1992 EG31)          Discovered 1992-Mar-01 by UESAC at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1992 EG31 = 1989 TE15 = 1998 HZ113 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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