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17809 (1998 FR78)
Classification: Outer Main-belt Asteroid          SPK-ID: 2017809
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 .1197382732265744 1.0929e-08  
a 3.215688926487118 1.6962e-08 au
q 2.830647887195734 4.1824e-08 au
i 15.65452111004961 5.5904e-07 deg
node 178.0737636687636 1.4031e-06 deg
peri 209.1178465315866 8.5141e-06 deg
M 147.047659543614 1.0922e-05 deg
tp 2458340.169959109047
(2018-Aug-09.66995911)
6.1696e-05 TDB
period 2106.247836123369
5.77
1.6665e-05
4.563e-08
d
yr
n .1709200569020377 1.3524e-09 deg/d
Q 3.600729965778502 1.8994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2166  
   data-arc span      10542 days (28.86 yr)  
   first obs. used      1992-04-26  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4896  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:13:52  

Additional Information
 Earth MOID = 1.84179 au 
 Jupiter MOID = 1.88963 au 
 T_jup = 3.121 
[ 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 12.74   n/a E2021B10  
diameter diameter 16.278 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 61.7073 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.060   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17809 (1998 FR78)          Discovered 1998-Mar-24 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FR78 = 2000 QJ23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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