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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07993263287782756 9.604e-09  
a 2.288248130473038 6.7768e-09 au
q 2.105342432726562 2.081e-08 au
i 7.262959593764554 1.1705e-06 deg
node 332.0040140155889 7.0796e-06 deg
peri 261.5742996631474 1.6829e-05 deg
M 165.6164137145056 1.4444e-05 deg
tp 2458618.860387358023
(2019-May-15.36038736)
5.0353e-05 TDB
period 1264.308626511288
3.46
5.6165e-06
1.538e-08
d
yr
n .2847406024535149 1.2649e-09 deg/d
Q 2.471153828219515 7.3185e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2925  
   data-arc span      10366 days (28.38 yr)  
   first obs. used      1992-09-25  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:49  

Additional Information
 Earth MOID = 1.10813 au 
 Jupiter MOID = 2.54927 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 14.14   n/a E2021B10  
rotation period rot_per 6.863 h n/a LCDB (Rev. 2020-October); 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.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

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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