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31189 Tricomi (1997 YZ7)
Classification: Main-belt Asteroid          SPK-ID: 2031189
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1934847619699978 1.1368e-07  
a 2.53309051374276 1.4567e-08 au
q 2.042976098642782 2.9156e-07 au
i 10.49028737935789 1.1408e-05 deg
node 280.8558380864824 3.1958e-05 deg
peri 149.5477218399429 3.7383e-05 deg
M 192.3387427503603 1.696e-05 deg
tp 2458086.311411694514
(2017-Nov-28.81141169)
7.0973e-05 JED
period 1472.565053251476
4.03
1.2702e-05
3.478e-08
d
yr
n .244471372728225 2.1088e-09 deg/d
Q 3.023204928842737 1.7385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      6459 days (17.68 yr)  
   first obs. used      1997-12-05  
   last obs. used      2015-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5313  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 15:19:03  

Additional Information
 Earth MOID = 1.06445 au 
 Jupiter MOID = 2.2754 au 
 T_jup = 3.400 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO279840  
rotation period rot_per 4.8963 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

31189 Tricomi           Discovered 1997 Dec. 27 by P. G. Comba at Prescott.
Francesco Giacomo Tricomi (1897-1978) was a professor in Torino and a prolific researcher in classical mathematical analysis. In the 1920s he solved a partial differential equation with mixed (elliptic/hyperbolic) boundary conditions. In the 1940s Tricomi's equation became the basic tool for modeling transonic flow.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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