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19109 (1981 EZ23)
Classification: Main-belt Asteroid          SPK-ID: 2019109
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06084737285646628 6.7655e-08  
a 2.628515597633783 1.9086e-08 au
q 2.468577329005523 1.8454e-07 au
i 2.915282778166106 6.7474e-06 deg
node 210.3971258940922 9.354e-05 deg
peri 18.39748371083834 0.00010688 deg
M 26.62103060900314 5.6349e-05 deg
tp 2458885.397003836042
(2020-Feb-05.89700384)
0.00024302 TDB
period 1556.554260713368
4.26
1.6953e-05
4.641e-08
d
yr
n .2312800838918473 2.519e-09 deg/d
Q 2.788453866262043 2.0247e-08 au
  Orbit Determination Parameters
   # obs. used (total)      520  
   data-arc span      15344 days (42.01 yr)  
   first obs. used      1977-04-24  
   last obs. used      2019-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59327  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:41:44  

Additional Information
 Earth MOID = 1.45854 au 
 Jupiter MOID = 2.18734 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456616.5 (2013-Nov-20.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06184218795281025 6.8079e-08  
q 2.465207571016561 1.8648e-07 au
tp 2457323.196859142712
(2015-Oct-27.69685914)
0.00022638 TDB
node 210.5666454614749 9.356e-05 deg
peri 16.97896733566001 0.00010602 deg
i 2.915120809716323 6.7462e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      520  
   data-arc span      15344 days (42.01 yr)  
   first obs. used      1977-04-24  
   last obs. used      2019-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59327  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:41:44  

Additional Information
 Jupiter MOID = 2.18734 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.634750862382427E-15 -1.264059581546294E-14 -8.678789679679627E-12 -2.652859374771409E-14 -1.784273350009182E-12 -2.066641928553409E-15
q -1.264059581546294E-14 3.47746783580378E-14 2.479016203435088E-11 7.308089750329502E-14 5.090921941298752E-12 6.076388237797047E-15
tp -8.678789679679627E-12 2.479016203435088E-11 5.124887779951872E-8 7.528945189564132E-11 1.129095559543805E-8 9.785458905078658E-12
node -2.652859374771409E-14 7.308089750329502E-14 7.528945189564132E-11 8.753468791048302E-9 -8.725182519156587E-9 -1.546873923315763E-10
peri -1.784273350009182E-12 5.090921941298752E-12 1.129095559543805E-8 -8.725182519156587E-9 1.124001185785133E-8 1.566089590665576E-10
i -2.066641928553409E-15 6.076388237797047E-15 9.785458905078658E-12 -1.546873923315763E-10 1.566089590665576E-10 4.551088540429431E-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 15.9   n/a MPO467920  
diameter diameter 3.758 km 1.841 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.031   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19109 (1981 EZ23)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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