+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11761 Davidgill (4868 P-L) Classification: Main-belt Asteroid          SPK-ID: 2011761 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO169599 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1892567 n/a   a 3.0415059 n/a AU q 2.4658805 n/a AU i 1.84662 n/a deg node 20.41948 n/a deg peri 80.50230 n/a deg M 247.67368 n/a deg tp 2457005.0197038 (2014-Dec-13.51970380) n/a JED period 1937.4541368 5.30 n/a n/a d yr n 0.18581085 n/a deg/d Q 3.6171313 n/a AU   Orbit Determination Parameters    # obs. used (total)      342      first obs. used      1960-??-??      last obs. used      2010-01-12      # oppositions      10      planetary ephem.      DE403      condition code      0      fit RMS      0.58      data source      MPC:mpn      producer      MPCALB   Additional Information  T_jup = 3.211  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8 mag n/a PDS3 (MPC 35900)   11761 Davidgill           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. David Gill (1843-1914) was a British astronomer and instrument designer who directed the observatory at the Cape of Good Hope and carried out all the observations to measure distances to the stars in terms of the standard meter. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070926/MPCPages.arc Last Updated: 2007-09-30 Alternate Designations  4868 P-L = 1962 CE1 = 1997 TT11 = 1998 XT48 = 1999 BG21  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 08:12 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin