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4629 Walford (1986 TD7)
Classification: Main-belt Asteroid          SPK-ID: 2004629
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2064666666126275 4.4524e-08  
a 2.658638549404708 1.2154e-08 au
q 2.109718310381287 1.2022e-07 au
i 11.90022407256071 4.966e-06 deg
node 32.10913431815148 2.0642e-05 deg
peri 291.5892338642815 2.2774e-05 deg
M 225.1835395428517 9.9869e-06 deg
tp 2459193.463270827271
(2020-Dec-09.96327083)		 4.4973e-05 TDB
period 1583.388087581995
4.34		 1.0858e-05
2.973e-08		 d
yr
n .2273605585537522 1.559e-09 deg/d
Q 3.20755878842813 1.4663e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1525  
   data-arc span      16630 days (45.53 yr)  
   first obs. used      1973-10-26  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52095  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:34:31  

Additional Information
 Earth MOID = 1.13198 au 
 Jupiter MOID = 2.2706 au 
 T_jup = 3.326 
[ 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 13.5   n/a MPO435742  
diameter diameter 9.674 km 0.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.143   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4629 Walford (1986 TD7)          Discovered 1986-Oct-07 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1986 TD7 = 1973 UF1 = 1976 GC7 = 1976 JH = 1986 UK 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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