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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2313870196132909 1.0621e-07  
a 2.609165317764636 2.7806e-08 AU
q 2.005438331208712 2.8738e-07 AU
i 5.041454799660003 1.135e-05 deg
node 325.7533339453283 6.8505e-05 deg
peri 44.03256062464336 7.1725e-05 deg
M 173.212908399347 2.0497e-05 deg
tp 2456259.823483051907
(2012-Nov-28.32348305)
8.1274e-05 JED
period 1539.39766132533
4.21
2.4608e-05
6.737e-08
d
yr
n .2338577022977035 3.7384e-09 deg/d
Q 3.21289230432056 3.424e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      443  
   data-arc span      8584 days (23.50 yr)  
   first obs. used      1991-09-12  
   last obs. used      2015-03-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57128  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 20:02:35  

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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