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20421 (1998 TG3)
Classification: Main-belt Asteroid          SPK-ID: 2020421
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2964037276697803 2.6386e-08  
a 2.413851255246266 7.9926e-09 au
q 1.698376745150894 6.5513e-08 au
i 21.48633609226708 5.6881e-06 deg
node 203.374098931604 9.3327e-06 deg
peri 109.695970580015 1.4358e-05 deg
M 310.8884765719999 1.0714e-05 deg
tp 2459187.372368181720
(2020-Dec-03.87236818)
4.1016e-05 TDB
period 1369.822148645951
3.75
6.8035e-06
1.863e-08
d
yr
n .2628078399490436 1.3053e-09 deg/d
Q 3.129325765341637 1.0362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1790  
   data-arc span      17979 days (49.22 yr)  
   first obs. used      1971-05-14  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44488  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:35:24  

Additional Information
 Earth MOID = .805303 au 
 Jupiter MOID = 2.64576 au 
 T_jup = 3.366 
[ 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 13.8   n/a MPO384929  
rotation period rot_per 11.8905 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Pravec, P.; Vilagi, J.; Pray, D.P. (2010) Minor Planet Bull. 37, 55.]

20421 (1998 TG3)          Discovered 1998-Oct-14 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 TG3 = 1983 RH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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