+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18483 (1995 YY2) Classification: Main-belt Asteroid          SPK-ID: 2018483 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .244290693049371 4.0491e-08   a 3.132851133636426 1.9515e-08 au q 2.367524758979877 1.3164e-07 au i 10.81147879178935 4.1361e-06 deg node 100.13708615 2.4813e-05 deg peri 267.8558037693646 2.6127e-05 deg M 251.9403127362102 1.0647e-05 deg tp 2459808.451970386811 (2022-Aug-16.95197039) 6.3787e-05 TDB period 2025.38721776027 5.55 1.8925e-05 5.181e-08 d yr n .1777437898507615 1.6608e-09 deg/d Q 3.898177508292976 2.4282e-08 au   Orbit Determination Parameters    # obs. used (total)      1488      data-arc span      23828 days (65.24 yr)      first obs. used      1955-10-23      last obs. used      2021-01-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47644      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:29:54   Additional Information  Earth MOID = 1.39541 au   Jupiter MOID = 1.74029 au   T_jup = 3.139  [ 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 13.23   n/a E2021B10   diameter diameter 15.117 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.102   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18483 (1995 YY2)          Discovered 1995-Dec-26 by Kobayashi, T. at Oizumi Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1995 YY2 = 1955 UZ1 = 1989 WH6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 19:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin