+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19330 (1996 XJ31) Classification: Main-belt Asteroid          SPK-ID: 2019330 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06490747523011481 3.2944e-08   a 2.754710560091544 1.2822e-08 au q 2.575909252646266 9.2907e-08 au i 10.30098615894686 3.6407e-06 deg node 107.5330726910262 2.3207e-05 deg peri 20.5940562470391 4.3458e-05 deg M 67.19724128054142 3.509e-05 deg tp 2458888.782395007135 (2020-Feb-09.28239501) 0.00016282 TDB period 1669.984297851333 4.57 1.166e-05 3.192e-08 d yr n .2155708891773354 1.5051e-09 deg/d Q 2.933511867536822 1.3655e-08 au   Orbit Determination Parameters    # obs. used (total)      2139      data-arc span      8801 days (24.10 yr)      first obs. used      1996-12-14      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49497      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:42:29   Additional Information  Earth MOID = 1.59391 au   Jupiter MOID = 2.13377 au   T_jup = 3.318  [ 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 13.38   n/a E2021B10   diameter diameter 4.583 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.335   0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19330 (1996 XJ31)          Discovered 1996-Dec-14 by Kobayashi, T. at Oizumi Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1996 XJ31 = 1998 HR123  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin