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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2324619511916222 3.42e-08  
a 3.117619411348705 2.0857e-08 au
q 2.392891519913709 1.1085e-07 au
i 16.47151252739563 5.495e-06 deg
node 35.08887404738876 1.372e-05 deg
peri 275.0409733966597 1.8127e-05 deg
M 132.2769527549879 1.1393e-05 deg
tp 2457861.720641128324
(2017-Apr-18.22064113)
6.4169e-05 TDB
period 2010.634231092647
5.50
2.0177e-05
5.524e-08
d
yr
n .1790479811956468 1.7967e-09 deg/d
Q 3.842347302783702 2.5705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1860  
   data-arc span      11563 days (31.66 yr)  
   first obs. used      1988-03-18  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45033  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 01:13:47  

Additional Information
 Earth MOID = 1.44772 au 
 Jupiter MOID = 1.84952 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-January); 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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