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20310 (1998 FD117)
Classification: Main-belt Asteroid          SPK-ID: 2020310
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2484109417641296 3.6825e-08  
a 2.329645794035085 7.8116e-09 au
q 1.750936288361986 8.8797e-08 au
i 11.41833261158781 3.6289e-06 deg
node 216.6038202307337 1.5173e-05 deg
peri 160.6445422043639 1.6277e-05 deg
M 260.892463842059 6.4022e-06 deg
tp 2459358.050547758088
(2021-May-23.55054776)
2.404e-05 TDB
period 1298.7730518069
3.56
6.5324e-06
1.788e-08
d
yr
n .2771846855762482 1.3942e-09 deg/d
Q 2.908355299708184 9.7521e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2039  
   data-arc span      10270 days (28.12 yr)  
   first obs. used      1992-08-04  
   last obs. used      2020-09-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4626  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:03:34  

Additional Information
 Earth MOID = .757956 au 
 Jupiter MOID = 2.56831 au 
 T_jup = 3.504 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO435888  
diameter diameter 3.649 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.488 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.333   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

20310 (1998 FD117)          Discovered 1998-Mar-31 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FD117 = 1992 PA5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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