+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17721 (1997 XT10) Classification: Main-belt Asteroid          SPK-ID: 2017721 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2624840215767137 4.4276e-08   a 3.068141522479307 1.5689e-08 au q 2.262803396892437 1.3617e-07 au i 13.30005917169379 4.7259e-06 deg node 304.3049977956935 1.8267e-05 deg peri 216.3794156969877 1.9675e-05 deg M 61.61624577208291 7.8422e-06 deg tp 2458664.527104701371 (2019-Jun-30.02710470) 4.1757e-05 TDB period 1962.960267895882 5.37 1.5056e-05 4.122e-08 d yr n .183396478210885 1.4067e-09 deg/d Q 3.873479648066177 1.9807e-08 au   Orbit Determination Parameters    # obs. used (total)      1364      data-arc span      12196 days (33.39 yr)      first obs. used      1987-01-26      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49307      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 18:14:11   Additional Information  Earth MOID = 1.28728 au   Jupiter MOID = 1.27629 au   T_jup = 3.138  [ 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 13.3   n/a MPO474002   diameter diameter 6.253 km 1.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.285   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17721 (1997 XT10)          Discovered 1997-Dec-10 by Beijing Schmidt CCD Asteroid Program at Xinglong Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 XT10 = 1987 BG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-03 13:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin