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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2190609371997769 1.2661e-08  
a 2.297951050353714 5.0746e-09 au
q 1.794559739624018 2.9846e-08 au
i 4.495701318727044 9.7295e-07 deg
node 94.47311460069152 1.4688e-05 deg
peri 287.585583007335 1.4914e-05 deg
M 6.103479107169797 3.9848e-06 deg
tp 2459178.928291231239
(2020-Nov-25.42829123)
1.4077e-05 TDB
period 1272.358767908523
3.48
4.2147e-06
1.154e-08
d
yr
n .2829390648926486 9.3724e-10 deg/d
Q 2.80134236108341 6.1863e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2634  
   data-arc span      24196 days (66.25 yr)  
   first obs. used      1954-12-21  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:44:50  

Additional Information
 Earth MOID = .802766 au 
 Jupiter MOID = 2.66397 au 
 T_jup = 3.557 
[ 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 13.91   n/a MPCxxxxx  
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

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