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15304 Wikberg (1992 UX4)
Classification: Main-belt Asteroid          SPK-ID: 2015304
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3271951294565865 4.8063e-08  
a 2.872439362666629 1.2978e-08 au
q 1.932591193542727 1.4051e-07 au
i 16.1311674039087 4.8958e-06 deg
node 239.4169874685124 2.3594e-05 deg
peri 173.1590685557519 2.5454e-05 deg
M 244.3801679477955 1.1429e-05 deg
tp 2459571.590011754933
(2021-Dec-23.09001176)
5.8736e-05 TDB
period 1778.175945965282
4.87
1.2051e-05
3.299e-08
d
yr
n .2024546563105004 1.3721e-09 deg/d
Q 3.812287531790532 1.7225e-08 au
  Orbit Determination Parameters
   # obs. used (total)      908  
   data-arc span      32670 days (89.45 yr)  
   first obs. used      1929-11-27  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56573  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:19:30  

Additional Information
 Earth MOID = .945021 au 
 Jupiter MOID = 1.57729 au 
 T_jup = 3.160 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456568.5 (2013-Oct-03.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3318279783131138 4.8055e-08  
q 1.912834633508781 1.4009e-07 au
tp 2456026.961333421650
(2012-Apr-09.46133342)
4.8474e-05 TDB
node 239.4605602069818 2.3548e-05 deg
peri 173.1274093894123 2.5319e-05 deg
i 16.17725071430258 4.9134e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      908  
   data-arc span      32670 days (89.45 yr)  
   first obs. used      1929-11-27  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56573  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:19:30  

Additional Information
 Jupiter MOID = 1.57729 au 
 T_jup = 3.160 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.309244706051374E-15 -6.719652497221249E-15 -1.154776359973816E-12 3.96630871769099E-15 -2.041634021041841E-13 -7.884301564912878E-15
q -6.719652497221249E-15 1.962435247662704E-14 3.35944657938894E-12 -1.253578137714446E-14 6.007433353561762E-13 2.372614377165911E-14
tp -1.154776359973816E-12 3.35944657938894E-12 2.349681408874148E-9 -4.095135577052939E-12 5.12769948005931E-10 9.846482259705614E-12
node 3.96630871769099E-15 -1.253578137714446E-14 -4.095135577052939E-12 5.544903322927758E-10 -5.332538661478053E-10 -2.254175468286732E-11
peri -2.041634021041841E-13 6.007433353561762E-13 5.12769948005931E-10 -5.332538661478053E-10 6.410397188180801E-10 2.404486503017368E-11
i -7.884301564912878E-15 2.372614377165911E-14 9.846482259705614E-12 -2.254175468286732E-11 2.404486503017368E-11 2.414142954071561E-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 13.5   n/a MPO473973  

15304 Wikberg           Discovered 1992 Oct. 21 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Leonard Wikberg III (b. 1959) is a well-known planetary animator and the creator of extraordinary space images. As a graphics artist, he has helped to produce programs for Canadian, English, German and Japanese television. His web site is a repository for information on cratering.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1992 UX4 = 1987 WH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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