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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1757229892555711 5.5173e-08  
a 2.80462389672457 2.3205e-08 AU
q 2.31178700185452 1.4944e-07 AU
i 9.213394419373563 1.0162e-05 deg
node 186.215100612771 3.4635e-05 deg
peri 264.7040090885835 4.7296e-05 deg
M 124.1866059452505 2.9399e-05 deg
tp 2456408.689550549407
(2013-Apr-26.18955055)
0.00014106 JED
period 1715.577619507056
4.70
2.1292e-05
5.829e-08
d
yr
n .2098418607858969 2.6043e-09 deg/d
Q 3.297460791594619 2.7283e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      22695 days (62.14 yr)  
   first obs. used      1953-04-05  
   last obs. used      2015-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49353  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:06:15  

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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