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

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2303331801631051 4.7057e-08  
a 2.609857543986045 1.6613e-08 au
q 2.008720756107068 1.2793e-07 au
i 5.042959521981011 5.6751e-06 deg
node 325.6912094011836 4.276e-05 deg
peri 43.6234506760111 4.419e-05 deg
M 13.901198752926 1.5052e-05 deg
tp 2459337.033362457508
(2021-May-02.53336246)
6.3949e-05 TDB
period 1540.010318231816
4.22
1.4704e-05
4.026e-08
d
yr
n .2337646675077729 2.232e-09 deg/d
Q 3.210994331865021 2.0439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      750  
   data-arc span      10901 days (29.85 yr)  
   first obs. used      1991-09-12  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55819  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 22:04:34  

Additional Information
 Earth MOID = 1.01056 au 
 Jupiter MOID = 2.27734 au 
 T_jup = 3.367 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.16   n/a MPCxxxxx  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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