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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1287436462803463 6.3713e-08  
a 2.637885744360634 1.6313e-08 AU
q 2.298274715160701 1.6922e-07 AU
i 10.2982227500816 6.5996e-06 deg
node 92.21980968580866 3.9529e-05 deg
peri 22.71586061185625 5.2225e-05 deg
M 4.523380276110434 3.1286e-05 deg
tp 2456980.837307049192
(2014-Nov-19.33730705)
0.00013597 JED
period 1564.884893643692
4.28
1.4516e-05
3.974e-08
d
yr
n .2300488690652338 2.134e-09 deg/d
Q 2.977496773560567 1.8413e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      793  
   data-arc span      6245 days (17.10 yr)  
   first obs. used      1997-12-17  
   last obs. used      2015-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62185  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 14:24:53  

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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