+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160648 (1999 XC71) Classification: Main-belt Asteroid          SPK-ID: 2160648 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09003936229094214 4.3641e-08   a 2.736132720282939 1.9588e-08 au q 2.489773075005282 1.2811e-07 au i 6.620795226249697 5.6954e-06 deg node 230.8727382312197 3.6459e-05 deg peri 118.5249140109151 4.809e-05 deg M 310.4715067444798 3.2791e-05 deg tp 2459427.934729077282 (2021-Aug-01.43472908) 0.00015152 TDB period 1653.119186271553 4.53 1.7752e-05 4.86e-08 d yr n .2177701420379401 2.3386e-09 deg/d Q 2.982492365560595 2.1352e-08 au   Orbit Determination Parameters    # obs. used (total)      512      data-arc span      9372 days (25.66 yr)      first obs. used      1994-10-27      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49316      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 12:25:40   Additional Information  Earth MOID = 1.49077 au   Jupiter MOID = 2.38393 au   T_jup = 3.336  [ 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 15.58   n/a E2021B55   diameter diameter 5.482 km 0.427 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.049   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   160648 (1999 XC71)          Discovered 1999-Dec-07 by LINEAR at Socorro Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ show close-approach data ] Alternate Designations  1999 XC71 = 2003 ST105  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 09:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin