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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2961577091675566 4.0701e-08  
a 2.413864035486408 1.1371e-08 au
q 1.6989795924948 9.5254e-08 au
i 21.48513753021355 6.0918e-06 deg
node 203.3784415532882 1.1316e-05 deg
peri 109.6940816105132 1.6286e-05 deg
M 205.7354088762041 1.4994e-05 deg
tp 2459187.490921945780
(2020-Dec-03.99092195)
5.9642e-05 TDB
period 1369.833027534498
3.75
9.6796e-06
2.65e-08
d
yr
n .2628057527915998 1.8571e-09 deg/d
Q 3.128748478478016 1.4739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1401  
   data-arc span      17497 days (47.90 yr)  
   first obs. used      1971-05-14  
   last obs. used      2019-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47669  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:40:57  

Additional Information
 Earth MOID = .805098 au 
 Jupiter MOID = 2.64441 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-January); 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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