+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05382080389916433 3.6385e-08   a 3.154822831611106 2.2344e-08 au q 2.985027730654359 1.1812e-07 au i 8.331927211737399 5.7319e-06 deg node 201.1315486090975 2.8308e-05 deg peri 274.1418714002466 6.1846e-05 deg M 37.16615435563536 5.4152e-05 deg tp 2458989.196828705657 (2020-May-19.69682871) 0.00030782 TDB period 2046.731575671602 5.60 2.1744e-05 5.953e-08 d yr n .1758901872034059 1.8686e-09 deg/d Q 3.324617932567854 2.3547e-08 au   Orbit Determination Parameters    # obs. used (total)      1028      data-arc span      8854 days (24.24 yr)      first obs. used      1996-10-18      last obs. used      2021-01-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53725      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 05:47:00   Additional Information  Earth MOID = 2.01651 au   Jupiter MOID = 1.7644 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 14.26   n/a E2021B10   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 ] 2021-Mar-08 16:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin