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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1272587339666539 3.8704e-08  
a 2.308527442745993 8.1047e-09 au
q 2.014747163054861 8.7505e-08 au
i 3.667903101806803 4.6754e-06 deg
node 354.5292185506027 6.458e-05 deg
peri 102.3407575992408 6.8672e-05 deg
M 148.9670107424252 2.0733e-05 deg
tp 2458070.362419613618
(2017-Nov-12.86241961)
7.3433e-05 TDB
period 1281.152974661552
3.51
6.7467e-06
1.847e-08
d
yr
n .2809968888337497 1.4798e-09 deg/d
Q 2.602307722437125 9.136e-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 = 1.03544 au 
 Jupiter MOID = 2.53976 au 
 T_jup = 3.573 
[ 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

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