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212997 (3238 T-2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2212997
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0831428926694031 4.5245e-08  
a 3.225675971966231 3.4516e-08 au
q 2.95748394084277 1.5745e-07 au
i 20.75959523536259 5.1381e-06 deg
node 177.2721089789244 1.2387e-05 deg
peri 190.5533650867902 2.9886e-05 deg
M 22.37816992982653 2.7598e-05 deg
tp 2458868.961888548769
(2020-Jan-20.46188855)
0.00016218 TDB
period 2116.067590465846
5.79
3.3964e-05
9.299e-08
d
yr
n .1701268908526438 2.7306e-09 deg/d
Q 3.493868003089692 3.7386e-08 au
  Orbit Determination Parameters
   # obs. used (total)      416  
   data-arc span      16855 days (46.15 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54499  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 02:53:24  

Additional Information
 Earth MOID = 1.95679 au 
 Jupiter MOID = 1.96491 au 
 T_jup = 3.080 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO450009  
diameter diameter 6.223 km 1.649 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.066   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212997 (3238 T-2)          Discovered 1973-Sep-30 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

[ show close-approach data ]
Alternate Designations
 3238 T-2 = 2002 TH203 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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