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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286771369374548 6.2906e-08  
a 2.636570058115255 1.4336e-08 au
q 2.297303771701965 1.6583e-07 au
i 10.29644523967463 6.0479e-06 deg
node 92.1895051509949 3.7734e-05 deg
peri 22.43707191825268 5.0291e-05 deg
M 96.84978562897669 2.9657e-05 deg
tp 2456979.818354970146
(2014-Nov-18.31835497)
0.00012885 JED
period 1563.714273885147
4.28
1.2753e-05
3.492e-08
d
yr
n .2302210870695433 1.8776e-09 deg/d
Q 2.975836344528545 1.618e-08 au
  Orbit Determination Parameters
   # obs. used (total)      927  
   data-arc span      6388 days (17.49 yr)  
   first obs. used      1997-12-17  
   last obs. used      2015-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6059  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:47:56  

Additional Information
 Earth MOID = 1.31721 au 
 Jupiter MOID = 2.16245 au 
 T_jup = 3.363 
[ 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 13.8 mag n/a MPO337518  

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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