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74828 (1999 TB21)
Classification: Main-belt Asteroid          SPK-ID: 2074828
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1279291797707184 3.8861e-08  
a 2.306911486376126 8.1129e-09 au
q 2.011790192120379 8.7965e-08 au
i 3.669671362549866 4.6783e-06 deg
node 354.4437036662792 6.4545e-05 deg
peri 102.7580010186734 6.8571e-05 deg
M 261.0320837028985 2.0616e-05 deg
tp 2459352.333144516986
(2021-May-17.83314452)		 7.3595e-05 TDB
period 1279.808010162427
3.50		 6.7512e-06
1.848e-08		 d
yr
n .2812921915954491 1.4839e-09 deg/d
Q 2.602032780631872 9.1508e-09 au
   Orbit Determination Parameters
   # obs. used (total)      832  
   data-arc span      7790 days (21.33 yr)  
   first obs. used      1997-01-09  
   last obs. used      2018-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53815  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:32:26  

Additional Information
 Earth MOID = 1.03238 au 
 Jupiter MOID = 2.53787 au 
 T_jup = 3.574 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO436306  

74828 (1999 TB21)          Discovered 1999-Oct-07 by Tucker, R. A. at Goodricke-Pigott
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 TB21 = 1997 EN25 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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