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31564 (1999 FF9)
Classification: Main-belt Asteroid          SPK-ID: 2031564
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1243021799143279 3.9705e-08  
a 2.30412730955196 7.5399e-09 au
q 2.017719262174516 8.9903e-08 au
i 5.939361474422394 3.3511e-06 deg
node 80.43121900746203 5.0101e-05 deg
peri 57.60581819217973 5.3986e-05 deg
M 59.36038329326588 1.9603e-05 deg
tp 2458789.854430157988
(2019-Nov-02.35443016)
6.9424e-05 TDB
period 1277.491837754474
3.50
6.2706e-06
1.717e-08
d
yr
n .2818021918893777 1.3832e-09 deg/d
Q 2.590535356929405 8.4771e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1739  
   data-arc span      14917 days (40.84 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46415  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 19:59:21  

Additional Information
 Earth MOID = 1.03877 au 
 Jupiter MOID = 2.44374 au 
 T_jup = 3.572 
[ 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 13.9   n/a MPO452614  

31564 (1999 FF9)          Discovered 1999-Mar-20 by LONEOS at Anderson Mesa
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 FF9 = 1979 PJ = 1992 FB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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