+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2107365686621009 3.9488e-08   a 3.193404562872608 1.7101e-08 au q 2.520437442942939 1.2909e-07 au i 2.031245149859498 3.542e-06 deg node 125.5250481701383 0.00013199 deg peri 224.8307279546175 0.00013229 deg M 252.190785081875 1.1501e-05 deg tp 2459624.712874470804 (2022-Feb-14.21287447) 6.9313e-05 TDB period 2084.391719020948 5.71 1.6743e-05 4.584e-08 d yr n .1727122578327524 1.3873e-09 deg/d Q 3.866371682802277 2.0705e-08 au   Orbit Determination Parameters    # obs. used (total)      1829      data-arc span      14265 days (39.06 yr)      first obs. used      1981-07-02      last obs. used      2020-07-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52391      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:56:54   Additional Information  Earth MOID = 1.51502 au   Jupiter MOID = 1.56756 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 13.2   n/a MPO395115   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-Jan-15 19:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin