+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2110853781848019 3.8232e-08   a 3.196330947858494 1.5954e-08 au q 2.521632220925997 1.2659e-07 au i 2.031426977995458 3.5158e-06 deg node 125.5207444602032 0.00012536 deg peri 224.6160014772055 0.00012564 deg M 320.7913615702545 1.0653e-05 deg tp 2459623.829238374070 (2022-Feb-13.32923837) 6.2582e-05 TDB period 2087.257530283905 5.71 1.5627e-05 4.278e-08 d yr n .1724751233505113 1.2913e-09 deg/d Q 3.871029674790991 1.9322e-08 au   Orbit Determination Parameters    # obs. used (total)      1911      data-arc span      14598 days (39.97 yr)      first obs. used      1981-07-02      last obs. used      2021-06-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51779      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:48:59   Additional Information  Earth MOID = 1.51532 au   Jupiter MOID = 1.56337 au   T_jup = 3.159  [ 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-Aug-03 18:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin