+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103067 (1999 XA143) Classification: Apollo [NEO, PHA]          SPK-ID: 2103067 [ 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 157 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5816440157058516 5.4735e-08   a 1.843310762890795 1.5724e-09 au q .7711600885691764 1.0096e-07 au i 38.54749575018199 1.2473e-05 deg node 116.6281188080496 4.3229e-06 deg peri 104.0158868500461 1.0433e-05 deg M 98.03943461100616 4.6472e-06 deg tp 2458951.560070355035 (2020-Apr-12.06007035) 1.1658e-05 TDB period 914.1053804295042 2.50 1.1697e-06 3.202e-09 d yr n .3938276786324673 5.0393e-10 deg/d Q 2.915461437212414 2.487e-09 au   Orbit Determination Parameters    # obs. used (total)      927      data-arc span      9373 days (25.66 yr)      first obs. used      1994-12-02      last obs. used      2020-07-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44265      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 07:26:01   Additional Information  Earth MOID = .0398706 au   Jupiter MOID = 3.04581 au   T_jup = 3.580  [ 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 16.79   n/a E2021B55   diameter diameter 1.282 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)   rotation period rot_per 9.8490 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Galad, A.; Pravec, P.; Kusnirak, P.; Gajdos, S.; et al. (2005) Earth, Moon, and Planets 97, 147-163.] [Warner, B.D. (2015) Minor Planet Bull. 42, 115-127.] [Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 200-213.] geometric albedo albedo 0.246   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)   103067 (1999 XA143)          Discovered 1999-Dec-14 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 20:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin