+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2101649844918421 3.4263e-08   a 2.599588346655205 1.0571e-08 au q 2.05324590209524 8.7233e-08 au i 3.645850467981629 3.8038e-06 deg node 240.9956939124193 6.5471e-05 deg peri 185.2125679503557 6.6274e-05 deg M 330.4583757681035 1.2868e-05 deg tp 2459522.128208873619 (2021-Nov-03.62820887) 5.5161e-05 TDB period 1530.9298784483 4.19 9.3378e-06 2.557e-08 d yr n .2351512012848584 1.4343e-09 deg/d Q 3.145930791215169 1.2792e-08 au   Orbit Determination Parameters    # obs. used (total)      1453      data-arc span      14966 days (40.97 yr)      first obs. used      1979-11-14      last obs. used      2020-11-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51425      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:31:20   Additional Information  Earth MOID = 1.06674 au   Jupiter MOID = 2.17191 au   T_jup = 3.381  [ 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 14.30   n/a MPCxxxxx   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 ] 2021-Aug-05 09:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin