+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103035 (1999 XY117) Classification: Main-belt Asteroid          SPK-ID: 2103035 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1183300322531419 3.7117e-08   a 2.236230575635538 7.9781e-09 au q 1.971617339495123 8.5425e-08 au i 2.421429835890528 4.331e-06 deg node 290.289342031453 9.681e-05 deg peri 158.2310028732834 9.9007e-05 deg M 81.7576718074527 1.9972e-05 deg tp 2458923.104562546455 (2020-Mar-14.60456255) 6.7574e-05 TDB period 1221.443263678814 3.34 6.5365e-06 1.79e-08 d yr n .294733296834215 1.5773e-09 deg/d Q 2.500843811775954 8.9221e-09 au   Orbit Determination Parameters    # obs. used (total)      740      data-arc span      7388 days (20.23 yr)      first obs. used      1999-11-03      last obs. used      2020-01-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57106      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:43:55   Additional Information  Earth MOID = .988022 au   Jupiter MOID = 2.6601 au   T_jup = 3.628  [ 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 16.5   n/a MPO453483   diameter diameter 1.481 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.222   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103035 (1999 XY117)          Discovered 1999-Dec-05 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 XY117 = 2002 RQ155  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-04 23:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin