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3430 Bradfield (1980 TF4)
Classification: Main-belt Asteroid          SPK-ID: 2003430
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09856067570830045 3.2137e-08  
a 2.757898467247415 1.1648e-08 au
q 2.486078130780624 9.2182e-08 au
i 4.428111217722457 4.2768e-06 deg
node 43.213684062 4.3159e-05 deg
peri 278.5135569882772 4.9095e-05 deg
M 274.3365650078299 2.523e-05 deg
tp 2459398.569424886410
(2021-Jul-03.06942489)
0.00011798 TDB
period 1672.884037071429
4.58
1.0598e-05
2.902e-08
d
yr
n .2151972234908884 1.3634e-09 deg/d
Q 3.029718803714206 1.2796e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2555  
   data-arc span      16903 days (46.28 yr)  
   first obs. used      1974-04-24  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:03:34  

Additional Information
 Earth MOID = 1.47843 au 
 Jupiter MOID = 2.23962 au 
 T_jup = 3.331 
[ 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 12.5   n/a MPO384782  
diameter diameter 8.492 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.269   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3430 Bradfield (1980 TF4)          Discovered 1980-Oct-09 by Shoemaker, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1980 TF4 = 1974 HY1 = 1976 YS7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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