+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1008 La Paz (A923 UD) Classification: Main-belt Asteroid          SPK-ID: 2001008 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07559246928131877 3.4036e-08   a 3.09813772728345 1.3405e-08 au q 2.863941846304481 1.0751e-07 au i 8.919442788920561 3.7969e-06 deg node 20.42076000945183 2.4677e-05 deg peri 14.29001985770767 3.5727e-05 deg M 252.761098002801 2.7014e-05 deg tp 2459593.834177238580 (2022-Jan-14.33417724) 0.00015108 TDB period 1991.817333335508 5.45 1.2927e-05 3.539e-08 d yr n .1807394653992402 1.173e-09 deg/d Q 3.332333608262419 1.4418e-08 au   Orbit Determination Parameters    # obs. used (total)      2849      data-arc span      35446 days (97.05 yr)      first obs. used      1923-10-31      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4021      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:40   Additional Information  Earth MOID = 1.87073 au   Jupiter MOID = 2.05989 au   T_jup = 3.200  [ 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 10.6   n/a MPO267710   diameter diameter 41.061 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.998 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.027   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   1008 La Paz (A923 UD)          Discovered 1923-Oct-31 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A923 UD = 1950 UN = 1970 JA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 05:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin