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9690 Houtgast (6039 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2009690
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175839321108279 6.1938e-08  
a 2.804371169989941 1.6419e-08 AU
q 2.31125244732328 1.7112e-07 AU
i 9.21393238959792 1.0649e-05 deg
node 186.2171582603016 4.118e-05 deg
peri 264.6794063102564 5.251e-05 deg
M 82.22874571309137 3.059e-05 deg
tp 2456408.692421112370
(2013-Apr-26.19242111)
0.00014582 JED
period 1715.345736777918
4.70
1.5065e-05
4.125e-08
d
yr
n .209870227489077 1.8432e-09 deg/d
Q 3.297489892656603 1.9307e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      872  
   data-arc span      22250 days (60.92 yr)  
   first obs. used      1953-04-05  
   last obs. used      2014-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52781  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:55:08  

Additional Information
 Earth MOID = 1.34886 AU 
 T_jup = 3.282 
[ 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 12.6 mag n/a MPO253432  

9690 Houtgast           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Dutch solar physicist Jacob Houtgast (1908-1982) was associate professor at University of Utrecht, known for his much-quoted 1942 paper on noncoherent scattering of light in Fraunhofer lines. Famous as a scientific eclipse observer, he chaired the IAU's subcommittee for solar eclipses.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 6039 P-L = 1953 GB1 = 1997 OM1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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