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19989 (1990 RN8)
Classification: Main-belt Asteroid          SPK-ID: 2019989
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08852789596805204 5.9089e-08  
a 2.711815244904948 2.426e-08 AU
q 2.471743947019426 1.5941e-07 AU
i 3.094514516492326 6.8044e-06 deg
node 168.0860128633427 0.000109 deg
peri 221.7120834221616 0.00011599 deg
M 75.5391946531972 3.7059e-05 deg
tp 2456458.238205335949
(2013-Jun-14.73820534)
0.00016862 JED
period 1631.129993439021
4.47
2.1888e-05
5.993e-08
d
yr
n .220705891895831 2.9617e-09 deg/d
Q 2.951886542790471 2.6408e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      809  
   data-arc span      8616 days (23.59 yr)  
   first obs. used      1990-08-16  
   last obs. used      2014-03-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59115  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:06:43  

Additional Information
 Earth MOID = 1.47625 AU 
 T_jup = 3.355 
[ 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 14.2 mag n/a MPO247535  

19989 (1990 RN8)          Discovered 1990-Sep-15 by Debehogne, H. at La Silla (809)
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 RN8 = 1986 WF4 = 1999 RN27 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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