+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15042 Anndavgui (1998 XZ8) Classification: Main-belt Asteroid          SPK-ID: 2015042 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3133005253864258 5.081e-08   a 3.113830841582093 1.8759e-08 au q 2.138266002949967 1.6245e-07 au i 16.92480115628658 8.4742e-06 deg node 309.116168050398 1.7961e-05 deg peri 81.65128577179559 2.3718e-05 deg M 358.3166584411846 1.6648e-05 deg tp 2459009.884490423618 (2020-Jun-09.38449042) 9.2853e-05 TDB period 2006.970323289436 5.49 1.8136e-05 4.965e-08 d yr n .1793748496539589 1.6209e-09 deg/d Q 4.08939568021422 2.4636e-08 au   Orbit Determination Parameters    # obs. used (total)      857      data-arc span      14750 days (40.38 yr)      first obs. used      1979-06-14      last obs. used      2019-11-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51633      source      ORB      producer      Otto Matic      solution date      2019-Nov-07 03:53:33   Additional Information  Earth MOID = 1.2184 au   Jupiter MOID = 1.97396 au   T_jup = 3.077  [ 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 13.5   n/a MPO452383   diameter diameter 5.057 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.398   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15042 Anndavgui           Discovered 1998 Dec. 14 by J.-C. Merlin at Le Creusot. The discoverer's spouse Annick (b. 1953), and their two sons David (b. 1985) and Guillaume (b. 1989), are all musicians, playing the violin, trumpet and French horn, respectively. They provide strong support to the discoverer in his astronomical activity. Annick is also a teacher of French literature and a famous astrophotographer. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000726/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] Alternate Designations  1998 XZ8 = 1981 RZ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-21 02:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin