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86212 (1999 TG21)
Classification: Mars-crossing Asteroid          SPK-ID: 2086212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3096754189020158 6.17e-08  
a 2.316906786413998 9.6359e-09 au
q 1.59941770677432 1.431e-07 au
i 25.3348962886655 9.2245e-06 deg
node 35.90828935645924 9.3636e-06 deg
peri 37.5395040708679 1.7088e-05 deg
M 290.2724248766956 1.3838e-05 deg
tp 2459249.995852676384
(2021-Feb-04.49585268)
5.0461e-05 TDB
period 1288.134669887281
3.53
8.0359e-06
2.2e-08
d
yr
n .2794738845368567 1.7435e-09 deg/d
Q 3.034395866053677 1.262e-08 au
  Orbit Determination Parameters
   # obs. used (total)      792  
   data-arc span      13605 days (37.25 yr)  
   first obs. used      1983-05-08  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4926  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:59:39  

Additional Information
 Earth MOID = .654442 au 
 Jupiter MOID = 2.50076 au 
 T_jup = 3.393 
[ 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 15.0   n/a MPO453293  
diameter diameter 2.612 km 0.431 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.264   0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

86212 (1999 TG21)          Discovered 1999-Oct-03 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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