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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .179480959438887 4.3529e-08  
a 2.562481996485155 1.9714e-08 au
q 2.102565269211125 1.0848e-07 au
i 10.99043174918629 5.2092e-06 deg
node 150.2777708425124 3.8289e-05 deg
peri 154.1023596806184 4.4784e-05 deg
M 128.8923833482986 2.4197e-05 deg
tp 2457064.068324225510
(2015-Feb-10.56832423)
9.992e-05 JED
period 1498.268542036124
4.10
1.729e-05
4.734e-08
d
yr
n .2402773534247509 2.7728e-09 deg/d
Q 3.022398723759185 2.3253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      924  
   data-arc span      9298 days (25.46 yr)  
   first obs. used      1990-08-15  
   last obs. used      2016-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50566  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 20:06:53  

Additional Information
 Earth MOID = 1.09323 au 
 Jupiter MOID = 2.27002 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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