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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1758393638850632 5.7772e-08  
a 2.80437116514243 1.6203e-08 AU
q 2.311252323366171 1.5837e-07 AU
i 9.21393086240486 1.0613e-05 deg
node 186.2171230949868 3.7121e-05 deg
peri 264.6794414679864 4.9443e-05 deg
M 82.22875048625995 3.0479e-05 deg
tp 2456408.692399384833
(2013-Apr-26.19239938)
0.00014534 JED
period 1715.345732330312
4.70
1.4866e-05
4.07e-08
d
yr
n .2098702280332355 1.8189e-09 deg/d
Q 3.297490006918688 1.9052e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      919  
   data-arc span      22283 days (61.01 yr)  
   first obs. used      1953-04-05  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52234  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:57:07  

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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