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JPL Small-Body Database Browser
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21015 Shigenari (1988 UF)
Classification: Main-belt Asteroid          SPK-ID: 2021015
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1108395194923995 6.4331e-08  
a 3.033306121848869 2.2496e-08 au
q 2.697095928829787 2.0461e-07 au
i 10.98768774352697 5.6081e-06 deg
node 24.40149262208886 2.4126e-05 deg
peri 324.6218340240957 3.0003e-05 deg
M 29.60614150519281 1.6655e-05 deg
tp 2458841.809072279568
(2019-Dec-24.30907228)
8.9332e-05 TDB
period 1929.624431786739
5.28
2.1466e-05
5.877e-08
d
yr
n .1865648019737485 2.0754e-09 deg/d
Q 3.369516314867952 2.4989e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1521  
   data-arc span      11382 days (31.16 yr)  
   first obs. used      1988-10-07  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:48:24  

Additional Information
 Earth MOID = 1.70076 au 
 Jupiter MOID = 2.10476 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456896.5 (2014-Aug-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1151697998352322 6.4955e-08  
q 2.683256751000035 2.0781e-07 au
tp 2456906.583116568799
(2014-Sep-06.08311657)
8.77e-05 TDB
node 24.48811755589843 2.4069e-05 deg
peri 323.7206580231399 2.9489e-05 deg
i 11.00933646826454 5.6225e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1521  
   data-arc span      11382 days (31.16 yr)  
   first obs. used      1988-10-07  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:48:24  

Additional Information
 Jupiter MOID = 2.10476 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.219087406578361E-15 -1.344778477315536E-14 9.141624794761774E-13 -6.678114328698483E-15 2.33726167869185E-13 -4.586649265861987E-15
q -1.344778477315536E-14 4.318438837350932E-14 -3.280322329934757E-12 2.079749045798785E-14 -8.152101753798401E-13 1.537097840829846E-14
tp 9.141624794761774E-13 -3.280322329934757E-12 7.691374471317159E-9 -8.877577480899635E-12 1.521754695388881E-9 7.360658363714512E-13
node -6.678114328698483E-15 2.079749045798785E-14 -8.877577480899635E-12 5.793009773927097E-10 -5.699930298581699E-10 -6.129781300969952E-11
peri 2.33726167869185E-13 -8.152101753798401E-13 1.521754695388881E-9 -5.699930298581699E-10 8.695834963773456E-10 6.025946514266148E-11
i -4.586649265861987E-15 1.537097840829846E-14 7.360658363714512E-13 -6.129781300969952E-11 6.025946514266148E-11 3.16120331996963E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO502324  
diameter diameter 9.138 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.160   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21015 Shigenari           Discovered 1988 Oct. 16 by T. Fujii and K. Watanabe at Kitami.
Shigenari Oonishi (b. 1946) is a famous illustrator, who has designed many record covers. He opened his private art museum, Shigechan Land, in his hometown (Tsubetsu town, Hokkaido, Japan) in 2001.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-10-05Last Updated: 2017-10-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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