Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936178395657643 1.4329e-07  
a 2.533134759209894 1.6229e-08 AU
q 2.042674679802731 3.6933e-07 AU
i 10.49041970662535 1.4164e-05 deg
node 280.8584261326348 3.2098e-05 deg
peri 149.5957890941539 4.2079e-05 deg
M 94.47388216773767 2.1345e-05 deg
tp 2456614.048382431129
(2013-Nov-17.54838243)
8.7916e-05 JED
period 1472.603635338945
4.03
1.4152e-05
3.875e-08
d
yr
n .2444649675994721 2.3493e-09 deg/d
Q 3.023594838617055 1.9371e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      441  
   data-arc span      6292 days (17.23 yr)  
   first obs. used      1997-12-05  
   last obs. used      2015-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51995  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:37:39  

Additional Information
 Earth MOID = 1.06446 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  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-31 22:02 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin