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4387 Tanaka (4829 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2004387
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01289066454769968 5.0145e-08  
a 2.438751093439281 1.4671e-08 AU
q 2.407313971178419 1.2095e-07 AU
i 4.272500202320001 5.4293e-06 deg
node 120.9090539367765 6.8354e-05 deg
peri 19.17964861964015 0.00022556 deg
M 160.1172393578234 0.00021493 deg
tp 2456381.792706770957
(2013-Mar-30.29270677)
0.00083006 JED
period 1391.072107261962
3.81
1.2552e-05
3.437e-08
d
yr
n .2587931985126103 2.3352e-09 deg/d
Q 2.470188215700142 1.486e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1279  
   data-arc span      21902 days (59.96 yr)  
   first obs. used      1954-09-04  
   last obs. used      2014-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49166  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:00:56  

Additional Information
 Earth MOID = 1.4207 AU 
 T_jup = 3.499 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO302090  
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)

4387 Tanaka (4829 T-2)          Discovered 1973-Sep-19 by van Houten and Gehrels at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 4829 T-2 = 1975 BS = 1979 FX2 = 1981 UM10 = 1983 EO3 = 1988 RZ1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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