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JPL Small-Body Database Browser
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20308 (1998 FP109)
Classification: Main-belt Asteroid          SPK-ID: 2020308
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07985695481428219 3.1434e-08  
a 2.288876089591229 8.275e-09 au
q 2.106093415129251 7.1463e-08 au
i 7.260166707226066 4.5765e-06 deg
node 332.03541564147 2.804e-05 deg
peri 262.0280165875364 4.1528e-05 deg
M 354.3475443327216 2.9611e-05 deg
tp 2458620.359417889289
(2019-May-16.85941789)
0.00010402 TDB
period 1264.829104548555
3.46
6.8591e-06
1.878e-08
d
yr
n .2846234315018328 1.5435e-09 deg/d
Q 2.471658764053207 8.9358e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1807  
   data-arc span      9831 days (26.92 yr)  
   first obs. used      1992-09-25  
   last obs. used      2019-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4959  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:29:37  

Additional Information
 Earth MOID = 1.11005 au 
 Jupiter MOID = 2.55152 au 
 T_jup = 3.585 
[ 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 14.1   n/a MPO492966  
rotation period rot_per 6.863 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20308 (1998 FP109)          Discovered 1998-Mar-31 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FP109 = 1999 RK20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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