+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103086 (1999 XZ161) Classification: Main-belt Asteroid          SPK-ID: 2103086 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1812510968407646 3.4376e-08   a 2.691267149136868 1.4895e-08 au q 2.203472026464294 9.3128e-08 au i 12.34272564277541 4.2716e-06 deg node 30.84971587926201 1.9675e-05 deg peri 17.35919947943974 2.3722e-05 deg M 294.9065787301743 1.52e-05 deg tp 2459492.087055168780 (2021-Oct-04.58705517) 6.959e-05 TDB period 1612.62594303705 4.42 1.3388e-05 3.665e-08 d yr n .2232383780965435 1.8533e-09 deg/d Q 3.179062271809443 1.7595e-08 au   Orbit Determination Parameters    # obs. used (total)      901      data-arc span      7618 days (20.86 yr)      first obs. used      1999-10-14      last obs. used      2020-08-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51495      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:50:48   Additional Information  Earth MOID = 1.21478 au   Jupiter MOID = 2.25742 au   T_jup = 3.315  [ 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 14.71   n/a E2021B55   diameter diameter 6.137 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.054   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103086 (1999 XZ161)          Discovered 1999-Dec-13 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 XZ161 = 2001 FD75  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-09 01:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin