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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2964709114120312 1.1291e-08  
a 2.414196564981622 7.8016e-09 au
q 1.698457509033725 2.9225e-08 au
i 21.48546355488088 5.0914e-07 deg
node 203.3628029196645 1.3316e-06 deg
peri 109.676152888329 3.9434e-06 deg
M 3.46596218160098 5.8372e-06 deg
tp 2459187.308970631885
(2020-Dec-03.80897063)
2.2191e-05 TDB
period 1370.116095821901
3.75
6.6414e-06
1.818e-08
d
yr
n .2627514566815189 1.2736e-09 deg/d
Q 3.129935620929518 1.0114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1959  
   data-arc span      18109 days (49.58 yr)  
   first obs. used      1971-05-14  
   last obs. used      2020-12-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44047  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:20:17  

Additional Information
 Earth MOID = .803936 au 
 Jupiter MOID = 2.64447 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 13.88   n/a E2021B10  
rotation period rot_per 11.8905 h n/a LCDB (Rev. 2020-October); 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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