+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11711 Urquiza (1998 HV50) Classification: Main-belt Asteroid          SPK-ID: 2011711 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1081831224965988 1.5948e-08   a 2.368905365748546 6.9293e-09 au q 2.112629786382921 3.9527e-08 au i 2.902086150562061 1.2531e-06 deg node 273.3874523321434 6.4328e-06 deg peri 54.12183006500666 1.301e-05 deg M 19.36779087981009 1.1972e-05 deg tp 2459324.853070861637 (2021-Apr-20.35307086) 4.4189e-05 TDB period 1331.741686487246 3.65 5.8432e-06 1.6e-08 d yr n .2703226936971366 1.1861e-09 deg/d Q 2.625180945114172 7.679e-09 au   Orbit Determination Parameters    # obs. used (total)      2282      data-arc span      14460 days (39.59 yr)      first obs. used      1981-11-24      last obs. used      2021-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48198      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 16:37:36   Additional Information  Earth MOID = 1.10179 au   Jupiter MOID = 2.64767 au   T_jup = 3.536  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.19   n/a E2021B10   diameter diameter 3.835 km 0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.302   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11711 Urquiza           Discovered 1998 Apr. 25 by LONEOS at the Anderson Mesa Station of the Lowell Observatory. Luis Urquiza del Valle (1906-2000) was the much-loved grandfather of LONEOS observer L. Levy. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010705/MPCPages.arc Last Updated: 2009-05-11 Alternate Designations  1998 HV50 = 1981 WW5 = 1994 EN2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 11:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin