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31268 Welty (1998 FA)
Classification: Main-belt Asteroid          SPK-ID: 2031268
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .128743645532419 6.5147e-08  
a 2.637885750515217 2.4537e-08 AU
q 2.298274722495867 1.7688e-07 AU
i 10.29822593241943 6.9689e-06 deg
node 92.21978193508346 4.5242e-05 deg
peri 22.71589494189802 5.9524e-05 deg
M 4.523370844040375 4.045e-05 deg
tp 2456980.837347980666
(2014-Nov-19.33734798)
0.00017568 JED
period 1564.884899120359
4.28
2.1834e-05
5.978e-08
d
yr
n .2300488682601259 3.2097e-09 deg/d
Q 2.977496778534568 2.7696e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      6155 days (16.85 yr)  
   first obs. used      1997-12-17  
   last obs. used      2014-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62696  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:58:34  

Additional Information
 Earth MOID = 1.31834 AU 
 T_jup = 3.362 
[ 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 13.7 mag n/a MPO266110  

31268 Welty           Discovered 1998 Mar. 16 by I. P. Griffin at Cocoa.
Sandra Welty (b. 1969) is a high-school teacher of English at Kenwood High School, Baltimore County, Maryland. Over her career she has been an inspiring teacher for many students.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070601/MPCPages.arcLast Updated: 2007-06-06
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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