+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101817 (1999 JP12) Classification: Main-belt Asteroid          SPK-ID: 2101817 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1450841089773206 3.879e-08   a 2.71981577804713 1.4034e-08 au q 2.325213729306705 1.1054e-07 au i 10.45175972214662 3.6267e-06 deg node 116.9147767967248 3.2781e-05 deg peri 355.1574219428094 3.8945e-05 deg M 344.4603783969442 2.1036e-05 deg tp 2459071.220544975301 (2020-Aug-09.72054498) 9.585e-05 TDB period 1638.353676906902 4.49 1.2681e-05 3.472e-08 d yr n .219732775086546 1.7007e-09 deg/d Q 3.114417826787556 1.607e-08 au   Orbit Determination Parameters    # obs. used (total)      850      data-arc span      7859 days (21.52 yr)      first obs. used      1999-05-08      last obs. used      2020-11-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5929      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:28:51   Additional Information  Earth MOID = 1.34193 au   Jupiter MOID = 1.99527 au   T_jup = 3.320  [ 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 14.7   n/a MPO226696   diameter diameter 3.087 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.294   0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101817 (1999 JP12)          Discovered 1999-May-08 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2139-Oct-04 18:28 00:03 Jupiter 1.99267739752226 1.99267705053257 1.99267774451195 3.27152431474022 3.13890685197441 2502590.269664904 2.6762596705888 221.213791615417 15.0275373932647 89.5396550071165 3422229.14199714 T 19 CATAB v2.0f-lin.ifort 2020-Dec-18 04:28:53 2020-Dec-18 04:28 Alternate Designations  1999 JP12 = 2001 TJ203  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 15:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin