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181951 (1999 TA228)
Classification: Main-belt Asteroid          SPK-ID: 2181951
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1283250827361287 3.7326e-08  
a 2.219062565941451 9.0658e-09 au
q 1.934301178570368 8.5096e-08 au
i 1.040364594484773 4.2211e-06 deg
node 197.17814206167 0.00021509 deg
peri 98.10742271575727 0.00021565 deg
M 230.6421120982248 1.6933e-05 deg
tp 2459634.353557524661
(2022-Feb-23.85355752)
5.7891e-05 TDB
period 1207.40438207738
3.31
7.3991e-06
2.026e-08
d
yr
n .298160256285146 1.8272e-09 deg/d
Q 2.503823953312533 1.0229e-08 au
  Orbit Determination Parameters
   # obs. used (total)      503  
   data-arc span      9959 days (27.27 yr)  
   first obs. used      1994-01-08  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54811  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:09:55  

Additional Information
 Earth MOID = .916668 au 
 Jupiter MOID = 2.65556 au 
 T_jup = 3.640 
[ 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 16.95   n/a MPCxxxxx  

181951 (1999 TA228)          Discovered 1999-Oct-01 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1999 TA228 = 2002 QC21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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