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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06656429088085596 4.1218e-08  
a 2.966545022623362 2.0672e-08 au
q 2.769079056826305 1.1955e-07 au
i 10.62623887765222 3.7814e-06 deg
node 94.96941780853957 2.2145e-05 deg
peri 272.0896633333198 3.5929e-05 deg
M 97.20443365842584 2.7741e-05 deg
tp 2458696.583688730513
(2019-Aug-01.08368873)
0.00014427 TDB
period 1866.271580723215
5.11
1.9507e-05
5.341e-08
d
yr
n .1928979703267481 2.0162e-09 deg/d
Q 3.164010988420419 2.2048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1065  
   data-arc span      7791 days (21.33 yr)  
   first obs. used      1999-11-04  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:26:02  

Additional Information
 Earth MOID = 1.79245 au 
 Jupiter MOID = 2.20468 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 14.51   n/a E2021B10  
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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