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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2065446856977179 2.562e-08  
a 2.659969624885146 1.1312e-08 au
q 2.110567034747767 7.2083e-08 au
i 11.89635169104855 1.7364e-06 deg
node 32.07194589391843 2.7176e-06 deg
peri 291.4018883760777 6.4732e-06 deg
M 1.755031475828829 4.831e-06 deg
tp 2459192.775046892328
(2020-Dec-09.27504689)
2.1248e-05 TDB
period 1584.577346368441
4.34
1.0108e-05
2.767e-08
d
yr
n .2271899196495858 1.4493e-09 deg/d
Q 3.209372215022525 1.3649e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1672  
   data-arc span      17206 days (47.11 yr)  
   first obs. used      1973-10-26  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52533  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:34:41  

Additional Information
 Earth MOID = 1.13186 au 
 Jupiter MOID = 2.27134 au 
 T_jup = 3.325 
[ 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 13.57   n/a E2021B10  
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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