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JPL Small-Body Database Browser
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20427 (1998 VX44)
Classification: Main-belt Asteroid          SPK-ID: 2020427
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .103410347142644 3.9274e-08  
a 3.136805720689609 2.0173e-08 au
q 2.812427552194065 1.2455e-07 au
i 24.02690848627694 5.0555e-06 deg
node 127.8173460481439 1.124e-05 deg
peri 237.7355541828652 2.895e-05 deg
M 320.9035178960101 2.8952e-05 deg
tp 2459220.876377269590
(2021-Jan-06.37637727)
0.00016416 TDB
period 2029.223386544952
5.56
1.9575e-05
5.359e-08
d
yr
n .1774077720506426 1.7114e-09 deg/d
Q 3.461183889185153 2.2259e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1608  
   data-arc span      8998 days (24.64 yr)  
   first obs. used      1995-01-29  
   last obs. used      2019-09-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45682  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:06:38  

Additional Information
 Earth MOID = 1.86611 au 
 Jupiter MOID = 2.01364 au 
 T_jup = 3.070 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456575.5 (2013-Oct-10.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1071577335623874 3.9312e-08  
q 2.799888526992126 1.2532e-07 au
tp 2457193.860428885732
(2015-Jun-20.36042889)
0.00015093 TDB
node 127.9884068447567 1.1273e-05 deg
peri 238.014327767751 2.8079e-05 deg
i 23.99211679589108 5.0513e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1608  
   data-arc span      8998 days (24.64 yr)  
   first obs. used      1995-01-29  
   last obs. used      2019-09-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45682  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:06:38  

Additional Information
 Jupiter MOID = 2.01364 au 
 T_jup = 3.070 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.545399598930602E-15 -4.87919663599323E-15 -4.479653306424726E-13 1.581485572562443E-15 -4.252825479705847E-14 3.583896078069687E-16
q -4.87919663599323E-15 1.570500487161977E-14 2.33396827084049E-12 -5.52377500019794E-15 2.736491674507967E-13 -2.503741228619783E-17
tp -4.479653306424726E-13 2.33396827084049E-12 2.278123986684167E-8 5.602957192215944E-12 3.904281691290129E-9 1.339933191497164E-11
node 1.581485572562443E-15 -5.52377500019794E-15 5.602957192215944E-12 1.270719507865552E-10 -1.148821244024008E-10 -8.221577447440197E-12
peri -4.252825479705847E-14 2.736491674507967E-13 3.904281691290129E-9 -1.148821244024008E-10 7.884287528243555E-10 9.755702320681222E-12
i 3.583896078069687E-16 -2.503741228619783E-17 1.339933191497164E-11 -8.221577447440197E-12 9.755702320681222E-12 2.551595187916822E-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 12.6   n/a MPO492967  
diameter diameter 17.924 km 0.675 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.066   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20427 (1998 VX44)          Discovered 1998-Nov-13 by Lagerkvist, C.-I. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 VX44 = 2000 AO190 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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