+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26421 (1999 XP113) Classification: Main-belt Asteroid          SPK-ID: 2026421 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1186130097122182 4.8098e-08   a 2.550611719838335 1.1322e-08 au q 2.248075987141053 1.2611e-07 au i 13.1521214894171 5.0289e-06 deg node 324.2116341850661 1.8079e-05 deg peri 174.7029622878066 2.5869e-05 deg M 300.5590175990221 1.8494e-05 deg tp 2459246.167909927503 (2021-Jan-31.66790993) 7.6685e-05 TDB period 1487.86988373271 4.07 9.9065e-06 2.712e-08 d yr n .2419566414617157 1.611e-09 deg/d Q 2.853147452535617 1.2665e-08 au   Orbit Determination Parameters    # obs. used (total)      1734      data-arc span      13915 days (38.10 yr)      first obs. used      1982-10-12      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44231      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 20:50:52   Additional Information  Earth MOID = 1.26144 au   Jupiter MOID = 2.17462 au   T_jup = 3.394  [ 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 13.6   n/a MPO412373   diameter diameter 5.463 km 0.343 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.320 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Zeigler, K.; Banshaw, B.; Gass, J. (2017) Minor Planet Bull. 44, 259-260.] geometric albedo albedo 0.258   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26421 (1999 XP113)          Discovered 1999-Dec-11 by LINEAR at Socorro Reference: 20010705/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 22:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin