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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .128743646697076 6.5174e-08  
a 2.637885746121457 2.5191e-08 AU
q 2.298274715595543 1.7715e-07 AU
i 10.29822605336945 6.9728e-06 deg
node 92.21977981757809 4.5639e-05 deg
peri 22.71589215360812 6.0156e-05 deg
M 4.523377449958564 4.1349e-05 deg
tp 2456980.837319314510
(2014-Nov-19.33731931)
0.00017958 JED
period 1564.884895210564
4.28
2.2416e-05
6.137e-08
d
yr
n .2300488688348928 3.2953e-09 deg/d
Q 2.977496776647371 2.8434e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      763  
   data-arc span      6132 days (16.79 yr)  
   first obs. used      1997-12-17  
   last obs. used      2014-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62818  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 15:04:36  

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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