+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   59430 (1999 GT12) Classification: Main-belt Asteroid          SPK-ID: 2059430 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05385850589364312 3.7489e-08   a 3.155098077062677 2.3625e-08 au q 2.985169208684174 1.2344e-07 au i 8.331355692574906 5.9031e-06 deg node 201.140526118274 2.8811e-05 deg peri 274.2971618101109 6.2494e-05 deg M 1.840849233976761 5.5047e-05 deg tp 2458990.032729605848 (2020-May-20.53272961) 0.00031299 TDB period 2046.999435013119 5.60 2.2992e-05 6.295e-08 d yr n .1758671711590837 1.9753e-09 deg/d Q 3.325026945441179 2.4897e-08 au   Orbit Determination Parameters    # obs. used (total)      998      data-arc span      8765 days (24.00 yr)      first obs. used      1996-10-18      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53753      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:46:47   Additional Information  Earth MOID = 2.01671 au   Jupiter MOID = 1.76461 au   T_jup = 3.188  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3   n/a MPO365937   diameter diameter 8.724 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.058   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   59430 (1999 GT12)          Discovered 1999-Apr-12 by Spacewatch at Kitt Peak Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 GT12 = 2001 QG185  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Dec-01 22:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin