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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175215392359791 5.3769e-08  
a 2.80588236638718 2.1923e-08 au
q 2.314248586645232 1.4669e-07 au
i 9.213121729477837 8.1147e-06 deg
node 186.1998008192358 3.4416e-05 deg
peri 264.7253859924541 4.2219e-05 deg
M 250.0330260893869 2.4455e-05 deg
tp 2458124.899646125627
(2018-Jan-06.39964613)
0.00011776 JED
period 1716.732450587203
4.70
2.012e-05
5.509e-08
d
yr
n .2097007019800104 2.4576e-09 deg/d
Q 3.297516146129129 2.5764e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1030  
   data-arc span      22744 days (62.27 yr)  
   first obs. used      1953-04-05  
   last obs. used      2015-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48952  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:35:55  

Additional Information
 Earth MOID = 1.35087 au 
 Jupiter MOID = 2.01373 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 12.7 mag n/a MPO347603  

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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