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JPL Small-Body Database Browser
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74615 (1999 RT21)
Classification: Main-belt Asteroid          SPK-ID: 2074615
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1982764917427206 4.6478e-08  
a 2.412228150925596 1.0344e-08 au
q 1.933940015877039 1.1143e-07 au
i 2.269431861260779 3.319e-06 deg
node 99.51575191474429 0.00012098 deg
peri 246.50002203 0.00012133 deg
M 91.43837519447982 9.5861e-06 deg
tp 2458252.922225205358
(2018-May-14.42222521)
3.5652e-05 TDB
period 1368.440752145225
3.75
8.8025e-06
2.41e-08
d
yr
n .2630731359290849 1.6922e-09 deg/d
Q 2.890516285974153 1.2395e-08 au
  Orbit Determination Parameters
   # obs. used (total)      657  
   data-arc span      9099 days (24.91 yr)  
   first obs. used      1994-03-13  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54719  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:51:07  

Additional Information
 Earth MOID = .927215 au 
 Jupiter MOID = 2.52054 au 
 T_jup = 3.491 
[ 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 16.1   n/a MPO453160  

74615 (1999 RT21)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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