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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1793332808265216 4.9115e-08  
a 2.562774819629133 2.2866e-08 AU
q 2.103184003205444 1.2795e-07 AU
i 10.99008277832369 5.4998e-06 deg
node 150.2834355973586 4.177e-05 deg
peri 154.2535889710054 4.8543e-05 deg
M 296.5821169319873 2.7177e-05 deg
tp 2457064.481407010808
(2015-Feb-10.98140701)
0.00011417 JED
period 1498.525367394746
4.10
2.0055e-05
5.491e-08
d
yr
n .2402361733961676 3.2152e-09 deg/d
Q 3.022365636052823 2.6967e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      8722 days (23.88 yr)  
   first obs. used      1990-08-15  
   last obs. used      2014-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52276  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:48:19  

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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