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JPL Small-Body Database Browser
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66939 Franscini (1999 WQ8)
Classification: Main-belt Asteroid          SPK-ID: 2066939
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06643186696682653 4.4917e-08  
a 2.966002779799117 2.2805e-08 au
q 2.768965677708264 1.3465e-07 au
i 10.62693730906351 3.9237e-06 deg
node 94.96937114383653 2.595e-05 deg
peri 271.9599990647342 4.0152e-05 deg
M 58.76202756791314 2.9419e-05 deg
tp 2458695.956012870914
(2019-Jul-31.45601287)
0.00015324 TDB
period 1865.759911700822
5.11
2.1518e-05
5.891e-08
d
yr
n .1929508709787986 2.2253e-09 deg/d
Q 3.163039881889969 2.432e-08 au
  Orbit Determination Parameters
   # obs. used (total)      899  
   data-arc span      7369 days (20.18 yr)  
   first obs. used      1999-11-04  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 10:53:28  

Additional Information
 Earth MOID = 1.79384 au 
 Jupiter MOID = 2.20547 au 
 T_jup = 3.235 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO449425  
diameter diameter 5.087 km 0.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.156   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66939 Franscini           Discovered 1999 Nov. 28 by S. Sposetti at Gnosca.
Stefano Franscini (1796-1857), a member of the Ticino canton government in Switzerland, helped organize the public schools. In 1848, he was elected to the first federal council. He also played a key role in creating the polytechnic school in Zürich and the Swiss federal statistical office.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060219/MPCPages.arcLast Updated: 2010-06-03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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