+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11845 (1987 RZ) Classification: Main-belt Asteroid          SPK-ID: 2011845 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2108419028030156 3.9485e-08   a 3.194113964436284 1.6947e-08 au q 2.520660898404855 1.2924e-07 au i 2.031293477219725 3.5397e-06 deg node 125.5228677228025 0.00013188 deg peri 224.7717439053592 0.00013217 deg M 286.8076805548557 1.1647e-05 deg tp 2459624.423065873233 (2022-Feb-13.92306587) 6.9307e-05 TDB period 2085.086316040888 5.71 1.6594e-05 4.543e-08 d yr n .1726547228431097 1.3741e-09 deg/d Q 3.867567030467714 2.052e-08 au   Orbit Determination Parameters    # obs. used (total)      1833      data-arc span      14265 days (39.06 yr)      first obs. used      1981-07-02      last obs. used      2020-07-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52347      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:59:17   Additional Information  Earth MOID = 1.51347 au   Jupiter MOID = 1.56694 au   T_jup = 3.160  [ 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 13.25   n/a E2021B10   diameter diameter 10.046 km 0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.072   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11845 (1987 RZ)          Discovered 1987-Sep-12 by Debehogne, H. at La Silla Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1987 RZ = 1981 NJ1 = 1982 UK10 = 1991 FF3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 20:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin