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2478 Tokai (1981 JC)
Classification: Main-belt Asteroid          SPK-ID: 2002478
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06799421258795385 3.7729e-08  
a 2.225312919784299 9.4985e-09 au
q 2.074004520041765 8.647e-08 au
i 4.137794376295887 4.8289e-06 deg
node 228.812300231144 6.674e-05 deg
peri 233.577655605976 8.0741e-05 deg
M 344.8091384004548 4.675e-05 deg
tp 2457651.664056183328
(2016-Sep-20.16405618)
0.00015757 JED
period 1212.509251387658
3.32
7.7632e-06
2.125e-08
d
yr
n .2969049511069688 1.901e-09 deg/d
Q 2.376621319526833 1.0144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1798  
   data-arc span      30444 days (83.35 yr)  
   first obs. used      1932-09-30  
   last obs. used      2016-02-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44913  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 17:54:20  

Additional Information
 Earth MOID = 1.09235 au 
 Jupiter MOID = 2.71231 au 
 T_jup = 3.640 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2 mag n/a MPO365275  
rotation period rot_per 25.885 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Higgins, D.; Pravec, P.; Kusnirak, P.; Warner, B.D.; et al. (2007) CBET 824.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm]
[Oey, J. (2011) http://minorplanet.haoeydental.com.au]
[Oey, J. (2016) Minor Planet Bul. 43, 45-51.]
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2478 Tokai (1981 JC)          Discovered 1981-May-04 by Furuta, T. at Tokai
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 JC = 1931 HH = 1932 SE = 1934 ED = 1939 VH = 1951 JP = 1955 OE = 1955 QV = 1957 BD = 1972 RS = 1978 NU2 = 1979 XR = 1981 JT 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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