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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2310631310188316 4.7054e-08  
a 2.610926639792592 1.6526e-08 au
q 2.007637755541639 1.2816e-07 au
i 5.041346561147819 5.7866e-06 deg
node 325.7049839634612 4.314e-05 deg
peri 43.66855708098975 4.4622e-05 deg
M 281.3683368817329 1.4485e-05 deg
tp 2459337.077741343712
(2021-May-02.57774134)
6.4451e-05 TDB
period 1540.956684351083
4.22
1.463e-05
4.005e-08
d
yr
n .2336211028226278 2.218e-09 deg/d
Q 3.214215524043546 2.0344e-08 au
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      10103 days (27.66 yr)  
   first obs. used      1991-09-12  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56943  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:02:42  

Additional Information
 Earth MOID = 1.01031 au 
 Jupiter MOID = 2.27257 au 
 T_jup = 3.366 
[ 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 15.2   n/a MPO385376  

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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