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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2313870314603301 1.1097e-07  
a 2.609165317223379 2.7841e-08 AU
q 2.005438299881811 2.9968e-07 AU
i 5.0414533643898 1.1718e-05 deg
node 325.7533355512403 6.8609e-05 deg
peri 44.03255575217432 7.234e-05 deg
M 173.2129108816964 2.1541e-05 deg
tp 2456259.823472667595
(2012-Nov-28.32347267)
8.5873e-05 JED
period 1539.397660846321
4.21
2.4639e-05
6.746e-08
d
yr
n .2338577023704722 3.7431e-09 deg/d
Q 3.212892334564947 3.4283e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      437  
   data-arc span      8537 days (23.37 yr)  
   first obs. used      1991-09-12  
   last obs. used      2015-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57223  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 16:30:26  

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 (675)
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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