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18342 (1989 ST9)
Classification: Main-belt Asteroid          SPK-ID: 2018342
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2366827467771501 7.7201e-08  
a 2.349989190940601 2.6195e-08 AU
q 1.793787294332167 1.8149e-07 AU
i 2.274266696163268 8.7985e-06 deg
node 19.32147847644681 0.00016355 deg
peri 315.4498269338512 0.00016444 deg
M 317.2603715860624 2.1812e-05 deg
tp 2456956.715982694198
(2014-Oct-26.21598269)
8.1679e-05 JED
period 1315.822244059847
3.60
2.2001e-05
6.024e-08
d
yr
n .2735931860288769 4.5746e-09 deg/d
Q 2.906191087549035 3.2395e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      403  
   data-arc span      8609 days (23.57 yr)  
   first obs. used      1989-09-04  
   last obs. used      2013-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57089  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:05:26  

Additional Information
 Earth MOID = .783652 AU 
 T_jup = 3.519 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9 mag n/a PDS3 (MPO 5165)  

18342 (1989 ST9)          Discovered 1989-Sep-26 by Debehogne, H. at La Silla (809)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 ST9 = 1999 FM14 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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