+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18539 (1996 XX30) Classification: Main-belt Asteroid          SPK-ID: 2018539 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2107432018794935 3.7075e-08   a 2.602646168964288 1.1148e-08 au q 2.054156181957357 9.3861e-08 au i 3.648310910286642 3.9736e-06 deg node 241.1064606938039 6.941e-05 deg peri 184.7776057674392 7.0196e-05 deg M 237.8220660481746 1.2629e-05 deg tp 2459520.988810347961 (2021-Nov-02.48881035) 5.5669e-05 TDB period 1533.631856953383 4.20 9.8537e-06 2.698e-08 d yr n .2347369079272737 1.5082e-09 deg/d Q 3.15113615597122 1.3498e-08 au   Orbit Determination Parameters    # obs. used (total)      1351      data-arc span      14811 days (40.55 yr)      first obs. used      1979-11-14      last obs. used      2020-06-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51993      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 18:23:09   Additional Information  Earth MOID = 1.06788 au   Jupiter MOID = 2.16682 au   T_jup = 3.379  [ 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 MPO384913   diameter diameter 3.626 km 0.986 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.308   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18539 (1996 XX30)          Discovered 1996-Dec-14 by Kobayashi, T. at Oizumi Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1996 XX30 = 1979 VN3 = 1991 PH17  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-11 08:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin