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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09783162198132986 4.2207e-08  
a 3.037279000943504 1.8377e-08 au
q 2.740137069871368 1.3243e-07 au
i 10.44156394835888 4.5287e-06 deg
node 162.5795714364772 2.2413e-05 deg
peri 182.2832932050399 3.0832e-05 deg
M 300.4456830877742 2.3174e-05 deg
tp 2459320.342524805867
(2021-Apr-15.84252481)
0.00012577 TDB
period 1933.416667339437
5.29
1.7547e-05
4.804e-08
d
yr
n .1861988706735387 1.6899e-09 deg/d
Q 3.334420932015639 2.0175e-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 = 1.7326 au 
 Jupiter MOID = 2.07915 au 
 T_jup = 3.209 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456755.5 (2014-Apr-08.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09826885064188791 4.2293e-08  
q 2.73526720540512 1.3225e-07 au
tp 2457398.218459922458
(2016-Jan-10.71845992)
0.00011804 TDB
node 162.6752277459107 2.2423e-05 deg
peri 183.8537494140716 3.0749e-05 deg
i 10.4424045609128 4.5305e-06 deg
  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
 Jupiter MOID = 2.07915 au 
 T_jup = 3.209 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.788669370597481E-15 -5.549908646121768E-15 5.374215428241941E-13 -8.555151082079178E-15 1.443496589666854E-13 2.976052366739311E-16
q -5.549908646121768E-15 1.748884757864651E-14 -9.897211930614281E-13 2.605370528735845E-14 -3.44553595715558E-13 9.400635397184106E-17
tp 5.374215428241941E-13 -9.897211930614281E-13 1.393404250969735E-8 -1.248123504764644E-11 2.499552248288878E-9 3.133652327764278E-12
node -8.555151082079178E-15 2.605370528735845E-14 -1.248123504764644E-11 5.028052998710118E-10 -4.965659913376779E-10 2.433139426656548E-11
peri 1.443496589666854E-13 -3.44553595715558E-13 2.499552248288878E-9 -4.965659913376779E-10 9.455011820660879E-10 -2.339721058272303E-11
i 2.976052366739311E-16 9.400635397184106E-17 3.133652327764278E-12 2.433139426656548E-11 -2.339721058272303E-11 2.052582544276014E-11

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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