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4425 Bilk (1967 UQ)
Classification: Main-belt Asteroid          SPK-ID: 2004425
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 .162893189040541 2.9929e-08  
a 2.359627839762545 7.0768e-09 au
q 1.975260535994781 7.0876e-08 au
i 3.311411571515724 3.5097e-06 deg
node 67.87941329452686 5.9949e-05 deg
peri 51.46806219386457 6.1111e-05 deg
M 37.01396829752935 1.0954e-05 deg
tp 2458464.378463701096
(2018-Dec-11.87846370)
4.0217e-05 TDB
period 1323.925948001536
3.62
5.9559e-06
1.631e-08
d
yr
n .2719185318056643 1.2233e-09 deg/d
Q 2.743995143530308 8.2296e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2167  
   data-arc span      24343 days (66.65 yr)  
   first obs. used      1952-09-15  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47341  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:26:55  

Additional Information
 Earth MOID = .993675 au 
 Jupiter MOID = 2.34061 au 
 T_jup = 3.532 
[ 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 14.0   n/a MPO384793  
diameter diameter 5.279 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.251 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2008) Minor Planet Bull. 35, 163-167.]
geometric albedo albedo 0.191   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4425 Bilk           Discovered 1967 Oct. 30 by L. Kohoutek at Bergedorf.
Bilk is the district in the city of Düsseldorf where in 1843 Johann Benzenberg established a private observatory that he bequeathed to the city. C. Robert Luther discovered 24 minor planets from the observatory at Bilk during 1852-1890. The observatory was destroyed in 1943.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

[ show close-approach data ]
Alternate Designations
 1967 UQ = 1983 EQ1 = 1985 VE3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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