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4425 Bilk (1967 UQ)
Classification: Main-belt Asteroid          SPK-ID: 2004425
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1632393332701124 4.2215e-08  
a 2.359574264607234 1.1388e-08 AU
q 1.974398934851434 1.025e-07 AU
i 3.311608414761333 5.0914e-06 deg
node 67.90615884958605 8.0633e-05 deg
peri 51.70760092283439 8.2377e-05 deg
M 321.7505388870859 1.645e-05 deg
tp 2457141.160359520322
(2015-Apr-28.66035952)
6.0545e-05 JED
period 1323.880858813439
3.62
9.5845e-06
2.624e-08
d
yr
n .2719277929002303 1.9687e-09 deg/d
Q 2.744749594363034 1.3247e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1217  
   data-arc span      22773 days (62.35 yr)  
   first obs. used      1952-09-15  
   last obs. used      2015-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49327  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:09:51  

Additional Information
 Earth MOID = .99255 AU 
 T_jup = 3.532 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO267725  
rotation period rot_per 5.251 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2008) Minor Planet Bul. 35, 163-167.]

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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