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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06822595933438032 4.0925e-08  
a 2.225577817879272 1.0413e-08 AU
q 2.073735636181142 9.2175e-08 AU
i 4.137363601229202 5.6368e-06 deg
node 228.8259373027086 6.8803e-05 deg
peri 233.3790822817151 8.4681e-05 deg
M 166.9028129912395 4.876e-05 deg
tp 2456438.257386439433
(2013-May-25.75738644)
0.00016369 JED
period 1212.725760903911
3.32
8.5108e-06
2.33e-08
d
yr
n .2968519442777173 2.0833e-09 deg/d
Q 2.377419999577402 1.1123e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1451  
   data-arc span      29901 days (81.86 yr)  
   first obs. used      1932-09-30  
   last obs. used      2014-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45107  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:42:27  

Additional Information
 Earth MOID = 1.09347 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 12.0 mag n/a MPO319114  
rotation period rot_per 25.885 h n/a LCDB (Rev. 2015-Feb); 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]
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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