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172789 (2004 FQ31)
Classification: Main-belt Asteroid          SPK-ID: 2172789
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06280448749781903 8.7025e-08  
a 3.196179900450538 4.9687e-08 au
q 2.995445459851912 3.0162e-07 au
i 25.19957989503228 6.8233e-06 deg
node 95.33783451832022 1.8931e-05 deg
peri 111.3669024818561 6.5112e-05 deg
M 301.9301665779137 6.5896e-05 deg
tp 2459337.161404133266
(2021-May-02.66140413)
0.00038653 TDB
period 2087.109577309024
5.71
4.8669e-05
1.332e-07
d
yr
n .1724873499282962 4.0222e-09 deg/d
Q 3.396914341049165 5.2808e-08 au
  Orbit Determination Parameters
   # obs. used (total)      340  
   data-arc span      6605 days (18.08 yr)  
   first obs. used      2001-12-07  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6366  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 21:47:38  

Additional Information
 Earth MOID = 2.05525 au 
 Jupiter MOID = 1.84595 au 
 T_jup = 3.044 
[ 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 14.6   n/a MPO338376  
diameter diameter 7.775 km 0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172789 (2004 FQ31)          Discovered 2004-Mar-30 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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