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18688 (1998 FA123)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018688
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1339859399308545 3.107e-08  
a 3.214984730443782 1.8631e-08 au
q 2.784221979471927 1.0196e-07 au
i 3.356403757574221 3.767e-06 deg
node 119.471967049087 7.234e-05 deg
peri 142.8235139246554 7.4665e-05 deg
M 287.0592739829577 2.0583e-05 deg
tp 2459627.113289143349
(2022-Feb-16.61328914)
0.00012185 TDB
period 2105.556010721942
5.76
1.8303e-05
5.011e-08
d
yr
n .1709762163375389 1.4862e-09 deg/d
Q 3.645747481415637 2.1128e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1319  
   data-arc span      8853 days (24.24 yr)  
   first obs. used      1996-12-18  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56002  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:05  

Additional Information
 Earth MOID = 1.76787 au 
 Jupiter MOID = 1.43021 au 
 T_jup = 3.174 
[ 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 13.94   n/a E2021B10  
diameter diameter 7.311 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18688 (1998 FA123)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FA123 = 1999 NV31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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