+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103043 (1999 XP122) Classification: Main-belt Asteroid          SPK-ID: 2103043 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1272057899473363 5.8077e-08   a 2.404913747435395 1.421e-08 au q 2.098994794437667 1.4304e-07 au i 6.748276163487597 6.0565e-06 deg node 8.243610141120245 3.1286e-05 deg peri 343.4832795325094 3.7347e-05 deg M 282.1504298514386 2.5368e-05 deg tp 2459495.078741513680 (2021-Oct-07.57874151) 9.7677e-05 TDB period 1362.22135514109 3.73 1.2074e-05 3.306e-08 d yr n .264274230205937 2.3423e-09 deg/d Q 2.710832700433124 1.6018e-08 au   Orbit Determination Parameters    # obs. used (total)      661      data-arc span      7548 days (20.67 yr)      first obs. used      1999-10-12      last obs. used      2020-06-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54336      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:44:50   Additional Information  Earth MOID = 1.093 au   Jupiter MOID = 2.71173 au   T_jup = 3.503  [ hide covariance matrix ] Orbital Elements at Epoch 2457247.5 (2015-Aug-13.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1261947275736399 5.791e-08   q 2.102198623232618 1.4231e-07 au tp 2456768.229257266466 (2014-Apr-20.72925727) 8.4238e-05 TDB node 8.278029209350068 3.1305e-05 deg peri 343.0685892049956 3.7443e-05 deg i 6.746420998943708 6.0525e-06 deg   Orbit Determination Parameters    # obs. used (total)      661      data-arc span      7548 days (20.67 yr)      first obs. used      1999-10-12      last obs. used      2020-06-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54336      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:44:50   Additional Information  Jupiter MOID = 2.71173 au   T_jup = 3.503  Orbit Covariance (6×6)   e q tp node peri i e 3.353510978286385E-15 -8.210336419607026E-15 1.156831036072879E-12 -2.542542230806672E-15 2.638313837647984E-13 1.380574828294848E-15 q -8.210336419607026E-15 2.025191619849161E-14 -2.265610659988482E-12 4.488474039918609E-15 -5.017341475266119E-13 -3.564736622004979E-15 tp 1.156831036072879E-12 -2.265610659988482E-12 7.096039776492971E-9 -1.383242174313166E-11 1.738331234915441E-9 -3.906700133277314E-12 node -2.542542230806672E-15 4.488474039918609E-15 -1.383242174313166E-11 9.799977005665087E-10 -9.761023915529066E-10 1.805885011286495E-12 peri 2.638313837647984E-13 -5.017341475266119E-13 1.738331234915441E-9 -9.761023915529066E-10 1.401978334144011E-9 -2.779368079307885E-12 i 1.380574828294848E-15 -3.564736622004979E-15 -3.906700133277314E-12 1.805885011286495E-12 -2.779368079307885E-12 3.66326915964143E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.75   n/a E2021B55   diameter diameter 1.783 km 0.307 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.292   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103043 (1999 XP122)          Discovered 1999-Dec-07 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 21:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin