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22304 (1990 RU9)
Classification: Main-belt Asteroid          SPK-ID: 2022304
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1794262097513642 4.4098e-08  
a 2.562860268820195 2.0086e-08 au
q 2.103015964663425 1.1055e-07 au
i 10.99039835912923 5.3437e-06 deg
node 150.279815093679 3.8295e-05 deg
peri 154.1476987723312 4.48e-05 deg
M 80.79284071017111 2.4234e-05 deg
tp 2457064.177287443803
(2015-Feb-10.67728744)
0.00010037 JED
period 1498.600314779978
4.10
1.7618e-05
4.824e-08
d
yr
n .2402241588030458 2.8241e-09 deg/d
Q 3.022704572976965 2.369e-08 au
  Orbit Determination Parameters
   # obs. used (total)      903  
   data-arc span      9222 days (25.25 yr)  
   first obs. used      1990-08-15  
   last obs. used      2015-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5045  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 16:38:40  

Additional Information
 Earth MOID = 1.09222 au 
 Jupiter MOID = 2.26867 au 
 T_jup = 3.386 
[ 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 14.0 mag n/a PDS3 (MPO 9956)  

22304 (1990 RU9)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 RU9 = 1990 PH 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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