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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 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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