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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08342039266044937 3.8682e-08  
a 3.227301635432572 2.8605e-08 au
q 2.958078865771076 1.268e-07 au
i 20.75834899600827 4.2219e-06 deg
node 177.2601491101211 1.2199e-05 deg
peri 190.8313853060026 2.9336e-05 deg
M 89.4500402523624 2.6179e-05 deg
tp 2458870.318222733106
(2020-Jan-21.81822273)
0.00015513 TDB
period 2117.667463107476
5.80
2.8154e-05
7.708e-08
d
yr
n .1699983620052103 2.2601e-09 deg/d
Q 3.496524405094067 3.0991e-08 au
  Orbit Determination Parameters
   # obs. used (total)      522  
   data-arc span      17309 days (47.39 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51775  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:40:55  

Additional Information
 Earth MOID = 1.9567 au 
 Jupiter MOID = 1.96406 au 
 T_jup = 3.080 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457717.5 (2016-Nov-25.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08330849460972876 3.8814e-08  
q 2.960904257359252 1.266e-07 au
tp 2456733.232453289498
(2014-Mar-16.73245329)
0.00016191 TDB
node 177.4032625508364 1.2145e-05 deg
peri 187.8395924899031 2.9365e-05 deg
i 20.80419645946015 4.2284e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      522  
   data-arc span      17309 days (47.39 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51775  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:40:55  

Additional Information
 Jupiter MOID = 1.96406 au 
 T_jup = 3.080 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.506516696336036E-15 -4.809451389808893E-15 7.544690573147921E-13 2.234140760949915E-15 9.496640210877386E-14 -1.093364827176853E-15
q -4.809451389808893E-15 1.602808400735393E-14 -3.67234780870854E-12 -8.271066637808736E-15 -4.566033686812889E-13 6.230006192200002E-15
tp 7.544690573147921E-13 -3.67234780870854E-12 2.621620642871222E-8 -2.061331234690157E-12 4.342010240233737E-9 -1.696672682225107E-11
node 2.234140760949915E-15 -8.271066637808736E-15 -2.061331234690157E-12 1.474944196066726E-10 -1.381233734719234E-10 6.513789313769374E-12
peri 9.496640210877386E-14 -4.566033686812889E-13 4.342010240233737E-9 -1.381233734719234E-10 8.622845740059485E-10 -8.782467010580204E-12
i -1.093364827176853E-15 6.230006192200002E-15 -1.696672682225107E-11 6.513789313769374E-12 -8.782467010580204E-12 1.787907038395879E-11

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 15.13   n/a MPCxxxxx  
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

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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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