+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9690 Houtgast (6039 P-L) Classification: Main-belt Asteroid          SPK-ID: 2009690 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO253432 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1763669 n/a   a 2.8063708 n/a AU q 2.3114199 n/a AU i 9.21202 n/a deg node 186.24617 n/a deg peri 264.79996 n/a deg M 358.16970 n/a deg tp 2456409.2304330 (2013-Apr-26.73043300) n/a JED period 1717.1807174 4.70 n/a n/a d yr n 0.20964596 n/a deg/d Q 3.3013217 n/a AU   Orbit Determination Parameters    # obs. used (total)      781      first obs. used      1953-??-??      last obs. used      2013-02-05      # oppositions      16      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.281  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.1 mag n/a PDS3 (MPC 32911)   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.arc Last Updated: 2013-03-29 Alternate Designations  6039 P-L = 1953 GB1 = 1997 OM1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 02:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin