+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101515 (1998 XG27) Classification: Main-belt Asteroid          SPK-ID: 2101515 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09565157510113739 6.5811e-08   a 2.592598935545391 1.5543e-08 au q 2.344612763754942 1.7027e-07 au i 28.1656151274321 6.3367e-06 deg node 268.3757384536704 1.1643e-05 deg peri 204.9422699006831 3.5962e-05 deg M 84.31172229073586 3.0764e-05 deg tp 2458843.402430163594 (2019-Dec-25.90243016) 0.00013042 TDB period 1524.759803836101 4.17 1.3712e-05 3.754e-08 d yr n .2361027612967537 2.1232e-09 deg/d Q 2.840585107335839 1.703e-08 au   Orbit Determination Parameters    # obs. used (total)      902      data-arc span      7816 days (21.40 yr)      first obs. used      1998-11-23      last obs. used      2020-04-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4785      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:37:08   Additional Information  Earth MOID = 1.37371 au   Jupiter MOID = 2.40542 au   T_jup = 3.246  [ 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 14.6   n/a MPO453468   diameter diameter 6.697 km 0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.090   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101515 (1998 XG27)          Discovered 1998-Dec-15 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 XG27 = 2001 RX15  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 23:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin