+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2624369440167554 4.3123e-08   a 3.071769358737682 1.532e-08 au q 2.265623595506257 1.3184e-07 au i 13.30109611723794 4.6875e-06 deg node 304.3010449587103 1.8116e-05 deg peri 216.6365767111935 1.9546e-05 deg M 97.99239229999202 7.9212e-06 deg tp 2458665.232108925604 (2019-Jun-30.73210893) 4.1696e-05 TDB period 1966.442866267266 5.38 1.4711e-05 4.028e-08 d yr n .1830716804314574 1.3696e-09 deg/d Q 3.877915121969108 1.934e-08 au   Orbit Determination Parameters    # obs. used (total)      1401      data-arc span      12258 days (33.56 yr)      first obs. used      1987-01-26      last obs. used      2020-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48955      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:19:21   Additional Information  Earth MOID = 1.29004 au   Jupiter MOID = 1.27288 au   T_jup = 3.137  [ 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 13.26   n/a E2021B10   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 ] 2021-Apr-11 02:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin