Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
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 ]  
31268 Welty (1998 FA)
Classification: Main-belt Asteroid          SPK-ID: 2031268
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1264146473607677 4.5215e-08  
a 2.640262077413933 1.044e-08 au
q 2.306494277957643 1.168e-07 au
i 10.2859745679201 4.1367e-06 deg
node 92.16207758431626 2.1614e-05 deg
peri 22.59299836919479 2.8282e-05 deg
M 196.0444679757649 1.7742e-05 deg
tp 2460110.161975394860
(2023-Jun-14.66197539)
7.9177e-05 TDB
period 1566.999954012978
4.29
9.2939e-06
2.545e-08
d
yr
n .2297383602839713 1.3626e-09 deg/d
Q 2.974029876870223 1.1759e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1620  
   data-arc span      8584 days (23.50 yr)  
   first obs. used      1997-12-17  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53363  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:50:12  

Additional Information
 Earth MOID = 1.32691 au 
 Jupiter MOID = 2.1557 au 
 T_jup = 3.361 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.90   n/a MPCxxxxx  
diameter diameter 4.195 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.364   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-05 16:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin