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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1793332409304737 5.7904e-08  
a 2.562774825981776 2.6583e-08 AU
q 2.103184110663434 1.4336e-07 AU
i 10.99007742747116 6.017e-06 deg
node 150.2834249308273 4.3824e-05 deg
peri 154.2536059736724 5.0336e-05 deg
M 296.5821079090941 2.8403e-05 deg
tp 2457064.481445550778
(2015-Feb-10.98144555)
0.00011974 JED
period 1498.525372966596
4.10
2.3316e-05
6.384e-08
d
yr
n .2402361725029163 3.7379e-09 deg/d
Q 3.022365541300119 3.1351e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      695  
   data-arc span      8608 days (23.57 yr)  
   first obs. used      1990-08-15  
   last obs. used      2014-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56984  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:16:00  

Additional Information
 Earth MOID = 1.09332 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 (675)
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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