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4223 Shikoku (1988 JM)
Classification: Main-belt Asteroid          SPK-ID: 2004223
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067835998611303 2.0727e-08  
a 3.006532542007899 1.3856e-08 au
q 2.685484174072661 6.52e-08 au
i 9.240493722595552 7.963e-07 deg
node 269.1672483325364 4.817e-06 deg
peri 82.92398997567661 8.4074e-06 deg
M 14.65246587952777 7.8424e-06 deg
tp 2459318.999320869446
(2021-Apr-14.49932087)
4.1358e-05 TDB
period 1904.133046027525
5.21
1.3163e-05
3.604e-08
d
yr
n .189062419115642 1.307e-09 deg/d
Q 3.327580909943137 1.5336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2890  
   data-arc span      24772 days (67.82 yr)  
   first obs. used      1953-10-13  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42535  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:19:42  

Additional Information
 Earth MOID = 1.69897 au 
 Jupiter MOID = 2.10636 au 
 T_jup = 3.223 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457119.5 (2015-Apr-07.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1093278377656742 2.0804e-08  
q 2.677667913720244 6.5646e-08 au
tp 2457422.251726703713
(2016-Feb-03.75172670)
3.9562e-05 TDB
node 269.2399906417511 4.8137e-06 deg
peri 84.39577708151356 8.119e-06 deg
i 9.248618643105699 7.962e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2890  
   data-arc span      24772 days (67.82 yr)  
   first obs. used      1953-10-13  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42535  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:19:42  

Additional Information
 Jupiter MOID = 2.10636 au 
 T_jup = 3.223 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.328107826779627E-16 -1.342345989640547E-15 8.65788405420567E-14 -2.936283883588148E-14 8.181117061482024E-14 -4.7481553186269E-15
q -1.342345989640547E-15 4.309392636150146E-15 -3.083856774377553E-13 9.493529767502715E-14 -2.699601814431245E-13 1.54440399439948E-14
tp 8.65788405420567E-14 -3.083856774377553E-13 1.565127738405374E-9 9.587570015996279E-11 2.596763523682475E-10 1.525157959693375E-11
node -2.936283883588148E-14 9.493529767502715E-14 9.587570015996279E-11 2.317192803726609E-11 -2.585604519303151E-12 3.129798047947745E-12
peri 8.181117061482024E-14 -2.699601814431245E-13 2.596763523682475E-10 -2.585604519303151E-12 6.591885693817943E-11 5.759064610672727E-14
i -4.7481553186269E-15 1.54440399439948E-14 1.525157959693375E-11 3.129798047947745E-12 5.759064610672727E-14 6.339277795036723E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.96   n/a E2020-QM5  
diameter diameter 22.869 km 0.237 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.137 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Carbognani, A. (2011) Minor Planet Bull. 38, 57-63.]
[Durkee, R.I.; Ferrero, A. (2011) Minor Planet Bull. 38, 40-41.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.175   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4223 Shikoku (1988 JM)          Discovered 1988-May-07 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1988 JM = 1948 VA = 1953 TG = 1958 TO = 1961 FA = 1969 XE = 1980 XF3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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