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4620 Bickley (1978 OK)
Classification: Main-belt Asteroid          SPK-ID: 2004620
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2192258930513146 2.9921e-08  
a 2.298581728861988 5.256e-09 au
q 1.794673096600784 6.8997e-08 au
i 4.495811880393904 2.4119e-06 deg
node 94.47537267777857 4.3993e-05 deg
peri 287.535121432961 4.4443e-05 deg
M 309.5683345197282 6.1769e-06 deg
tp 2459178.815527310059
(2020-Nov-25.31552731)
2.1875e-05 TDB
period 1272.882606994863
3.48
4.366e-06
1.195e-08
d
yr
n .2828226248215621 9.7007e-10 deg/d
Q 2.802490361123192 6.4083e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2303  
   data-arc span      24049 days (65.84 yr)  
   first obs. used      1954-12-21  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4656  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:50:06  

Additional Information
 Earth MOID = .804161 au 
 Jupiter MOID = 2.66174 au 
 T_jup = 3.557 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO337290  
diameter diameter 3.817 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.401   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4620 Bickley           Discovered 1978 July 28 at Perth.
Named for the present site (since 1966) of the Perth Observatory. In 1915 the locality, in the Darling Range 23 km east-southeast of the center of the city, was officially named for Samuel Wallace Alexander Walsh Bickley (1810-1876), a pioneer in the area who was also a successful merchant and a nominated member of the Legislative Council of the colony (as it was at that time) of Western Australia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980411/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1978 OK = 1975 XA2 = 1980 DO3 = 1987 DD5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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