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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2201351745985988 3.213e-08  
a 2.297791678916312 7.9906e-09 au
q 1.791966906486862 7.2672e-08 au
i 4.495970682467449 3.0691e-06 deg
node 94.47896091153163 4.7834e-05 deg
peri 287.586872732061 4.8453e-05 deg
M 196.4397263957673 9.8623e-06 deg
tp 2459178.515830698102
(2020-Nov-25.01583070)
3.6616e-05 TDB
period 1272.226405996496
3.48
6.6362e-06
1.817e-08
d
yr
n .2829685017565902 1.476e-09 deg/d
Q 2.803616451345762 9.7496e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1755  
   data-arc span      23517 days (64.39 yr)  
   first obs. used      1954-12-21  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51137  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:33:46  

Additional Information
 Earth MOID = .800746 au 
 Jupiter MOID = 2.65779 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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