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JPL Small-Body Database Browser
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18648 (1998 FW9)
Classification: Main-belt Asteroid          SPK-ID: 2018648
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1824418330254882 3.8815e-08  
a 2.321265378556173 9.7744e-09 au
q 1.897769467953781 9.0961e-08 au
i 12.69438342789398 4.7854e-06 deg
node 194.6613740308462 1.7931e-05 deg
peri 62.67210181889532 2.1288e-05 deg
M 43.19876153861217 1.1145e-05 deg
tp 2458845.491892730823
(2019-Dec-27.99189273)
3.9785e-05 TDB
period 1291.771259854884
3.54
8.1591e-06
2.234e-08
d
yr
n .2786871106270332 1.7602e-09 deg/d
Q 2.744761289158566 1.1558e-08 au
  Orbit Determination Parameters
   # obs. used (total)      647  
   data-arc span      23521 days (64.40 yr)  
   first obs. used      1954-12-05  
   last obs. used      2019-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:42:59  

Additional Information
 Earth MOID = .921385 au 
 Jupiter MOID = 2.3549 au 
 T_jup = 3.523 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO435872  

18648 (1998 FW9)          Discovered 1998-Mar-24 by ODAS at Caussols
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FW9 = 1991 GX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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