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28343 (1999 FG9)
Classification: Main-belt Asteroid          SPK-ID: 2028343
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2328076557599279 3.3659e-08  
a 3.116841115008244 1.9133e-08 au
q 2.391216641647015 1.0787e-07 au
i 16.47130893732376 4.4768e-06 deg
node 35.06857739935628 1.3694e-05 deg
peri 275.0996575219394 1.656e-05 deg
M 203.8407492405639 1.043e-05 deg
tp 2459872.337688057525
(2022-Oct-19.83768806)
6.0738e-05 TDB
period 2009.881362611132
5.50
1.8507e-05
5.067e-08
d
yr
n .1791150496227832 1.6493e-09 deg/d
Q 3.842465588369473 2.3588e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2172  
   data-arc span      11780 days (32.25 yr)  
   first obs. used      1988-03-18  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42295  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 19:39:46  

Additional Information
 Earth MOID = 1.44679 au 
 Jupiter MOID = 1.85147 au 
 T_jup = 3.113 
[ 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 12.4   n/a MPO384988  
diameter diameter 9.342 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.00444 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.222   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

28343 (1999 FG9)          Discovered 1999-Mar-20 by LONEOS at Anderson Mesa
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 FG9 = 1988 FZ1 = 1994 HS1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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