+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   18750 Leonidakimov (1999 GA9) Classification: Main-belt Asteroid          SPK-ID: 2018750 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250398 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2373554 n/a   a 2.6036941 n/a AU q 1.9856932 n/a AU i 5.63787 n/a deg node 100.43899 n/a deg peri 196.17750 n/a deg M 63.21712 n/a deg tp 2456131.0268083 (2012-Jul-22.52680830) n/a JED period 1534.5581864 4.20 n/a n/a d yr n 0.23459521 n/a deg/d Q 3.2216950 n/a AU   Orbit Determination Parameters    # obs. used (total)      514      first obs. used      1991-??-??      last obs. used      2012-11-02      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.59      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.366  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.0 mag n/a PDS3 (MPO 5284)   18750 Leonidakimov           Discovered 1999 Apr. 10 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Leonid Afanas'evich Akimov (b. 1937) is a Ukrainian planetary scientist. An expert in lunar photometry, he was one of the earliest to study the opposition effect, and additionally made laboratory measurements of lunar regolith particles. The name was suggested by D. F. Lupishko and Yu. G. Shkuratov. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080321/MPCPages.arc Last Updated: 2008-03-26 Alternate Designations  1999 GA9 = 1991 NP7 = 1996 XH11  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-18 22:32 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin