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90720 (1991 RS19)
Classification: Main-belt Asteroid          SPK-ID: 2090720
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .231617159607736 9.7563e-08  
a 2.609417259759079 2.7735e-08 au
q 2.005031445822279 2.6528e-07 au
i 5.041218755857069 1.0175e-05 deg
node 325.7501531309845 6.8498e-05 deg
peri 43.95897150013326 7.082e-05 deg
M 313.6426491056693 2.0028e-05 deg
tp 2457798.757594366154
(2017-Feb-14.25759437)
8.7868e-05 JED
period 1539.620633942308
4.22
2.4546e-05
6.72e-08
d
yr
n .2338238343027363 3.7279e-09 deg/d
Q 3.213803073695879 3.4159e-08 au
  Orbit Determination Parameters
   # obs. used (total)      512  
   data-arc span      8649 days (23.68 yr)  
   first obs. used      1991-09-12  
   last obs. used      2015-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57669  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 19:07:26  

Additional Information
 Earth MOID = 1.00666 au 
 Jupiter MOID = 2.26578 au 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1 mag n/a MPO280374  

90720 (1991 RS19)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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