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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2366333904233486 7.1253e-08  
a 2.349875466266491 2.0725e-08 AU
q 1.793816467611204 1.7212e-07 AU
i 2.274293757483244 7.9314e-06 deg
node 19.31794318969689 0.00016339 deg
peri 315.4421877857831 0.00016403 deg
M 11.98617080066464 1.6613e-05 deg
tp 2456956.692985277131
(2014-Oct-26.19298528)
6.0375e-05 JED
period 1315.726728953206
3.60
1.7406e-05
4.766e-08
d
yr
n .2736130475105697 3.6197e-09 deg/d
Q 2.905934464921778 2.5629e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      412  
   data-arc span      9096 days (24.90 yr)  
   first obs. used      1989-09-04  
   last obs. used      2014-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57254  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:30:53  

Additional Information
 Earth MOID = .785463 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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