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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1757229865766721 5.5504e-08  
a 2.804623900052459 2.3348e-08 AU
q 2.311787012110927 1.5037e-07 AU
i 9.213396167492352 1.0346e-05 deg
node 186.2150950192151 3.5e-05 deg
peri 264.7040091912311 4.7969e-05 deg
M 124.1866094996611 2.9837e-05 deg
tp 2456408.689532557547
(2013-Apr-26.18953256)
0.00014325 JED
period 1715.577622560542
4.70
2.1423e-05
5.865e-08
d
yr
n .209841860412408 2.6203e-09 deg/d
Q 3.297460787993991 2.7451e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      22353 days (61.20 yr)  
   first obs. used      1953-04-05  
   last obs. used      2014-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49301  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:15:12  

Additional Information
 Earth MOID = 1.34974 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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