+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11239 Marcgraf (4141 P-L) Classification: Main-belt Asteroid          SPK-ID: 2011239 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256948 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1795563 n/a   a 2.5345922 n/a AU q 2.0794902 n/a AU i 4.37367 n/a deg node 215.97491 n/a deg peri 232.77520 n/a deg M 296.00998 n/a deg tp 2456662.4813225 (2014-Jan-04.98132250) n/a JED period 1473.8747713 4.04 n/a n/a d yr n 0.24425413 n/a deg/d Q 2.9896942 n/a AU   Orbit Determination Parameters    # obs. used (total)      840      first obs. used      1954-??-??      last obs. used      2012-11-05      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.51      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.422  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7 mag n/a PDS3 (MPC 35273)   11239 Marcgraf           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Georg Marcgraf (1610-1643), astronomer, mathematician and naturalist, made the first serious study of the southern sky during his stay in Dutch Brazil. He is also known for his zoological and cartographic work during the reign of Johan Maurits in Dutch Brazil. Marcgraf died in 1643 in Luanda (then Dutch Angola). NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040306/MPCPages.arc Last Updated: 2004-03-08 Alternate Designations  4141 P-L = 1954 GQ = 1999 JR79  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 22:08 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin