Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .068225962050522 4.1156e-08  
a 2.225577817123909 1.0471e-08 AU
q 2.07373562943233 9.2795e-08 AU
i 4.137363727676826 5.6525e-06 deg
node 228.8259345772917 6.9236e-05 deg
peri 233.3790888908229 8.5093e-05 deg
M 166.9028098060654 4.8846e-05 deg
tp 2456438.257397455512
(2013-May-25.75739746)
0.000164 JED
period 1212.725760286511
3.32
8.5583e-06
2.343e-08
d
yr
n .2968519444288449 2.0949e-09 deg/d
Q 2.377420004815488 1.1185e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1414  
   data-arc span      29875 days (81.79 yr)  
   first obs. used      1932-09-30  
   last obs. used      2014-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45454  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:58:29  

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 MPO265970  
rotation period rot_per 25.885 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Aug-27 21:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin