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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01388267418690663 1.1579e-08  
a 2.438708906731305 7.1631e-09 au
q 2.404853105542447 3.0619e-08 au
i 4.272934029979184 1.2594e-07 deg
node 120.8489509478805 9.6542e-06 deg
peri 17.48118631354663 6.7268e-05 deg
M 11.24106391349361 6.6914e-05 deg
tp 2459157.064653556444
(2020-Nov-03.56465356)
0.00025857 TDB
period 1391.036012250587
3.81
6.1287e-06
1.678e-08
d
yr
n .2587999137546038 1.1402e-09 deg/d
Q 2.472564707920163 7.2625e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3052  
   data-arc span      24308 days (66.55 yr)  
   first obs. used      1954-09-04  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43804  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:36:04  

Additional Information
 Earth MOID = 1.41779 au 
 Jupiter MOID = 2.49888 au 
 T_jup = 3.499 
[ 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 12.84   n/a E2021B10  
diameter diameter 7.137 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.263   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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
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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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