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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074699766612986 2.0821e-08  
a 3.008801800956882 1.4191e-08 au
q 2.685445941629573 6.584e-08 au
i 9.241624485214881 7.9794e-07 deg
node 269.1917999818693 4.8218e-06 deg
peri 82.90712318821245 8.3776e-06 deg
M 337.6177146499742 7.7371e-06 deg
tp 2459319.019749495254
(2021-Apr-14.51974950)
4.1153e-05 TDB
period 1906.289243973122
5.22
1.3486e-05
3.692e-08
d
yr
n .1888485711904253 1.3361e-09 deg/d
Q 3.332157660284191 1.5716e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2807  
   data-arc span      24535 days (67.17 yr)  
   first obs. used      1953-10-13  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43055  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:05:31  

Additional Information
 Earth MOID = 1.69803 au 
 Jupiter MOID = 2.10449 au 
 T_jup = 3.222 
[ show covariance matrix ]

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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