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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2313870120360275 1.0787e-07  
a 2.609165318082099 2.7819e-08 AU
q 2.005438351223051 2.9165e-07 AU
i 5.041454176222055 1.1477e-05 deg
node 325.7533345062428 6.852e-05 deg
peri 44.03256212125565 7.1904e-05 deg
M 173.2129068534442 2.0849e-05 deg
tp 2456259.823489527169
(2012-Nov-28.32348953)
8.2823e-05 JED
period 1539.397661606283
4.21
2.462e-05
6.741e-08
d
yr
n .2338577022550225 3.7401e-09 deg/d
Q 3.212892284941148 3.4256e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      8543 days (23.39 yr)  
   first obs. used      1991-09-12  
   last obs. used      2015-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57231  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 18:07:12  

Additional Information
 Earth MOID = 1.00829 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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