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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09783162032174234 4.2439e-08  
a 3.037278999960693 1.8568e-08 au
q 2.740137074025337 1.3289e-07 au
i 10.44156405864692 4.5704e-06 deg
node 162.5795718530704 2.2524e-05 deg
peri 182.2832916923079 3.1057e-05 deg
M 300.4456845214951 2.3485e-05 deg
tp 2459320.342516950680
(2021-Apr-15.84251695)
0.00012749 TDB
period 1933.416666401006
5.29
1.773e-05
4.854e-08
d
yr
n .1861988707639149 1.7075e-09 deg/d
Q 3.334420925896048 2.0385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1271  
   data-arc span      11202 days (30.67 yr)  
   first obs. used      1989-10-03  
   last obs. used      2020-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54083  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:21:50  

Additional Information
 Earth MOID = 1.7326 au 
 Jupiter MOID = 2.07915 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 13.8   n/a MPO296285  
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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