+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18676 Zdenkaplavcova (1998 FE73) Classification: Main-belt Asteroid          SPK-ID: 2018676 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07898348112313168 3.4484e-08   a 2.613830029636276 1.0907e-08 au q 2.407380634831424 9.1747e-08 au i 4.899029714882259 3.9328e-06 deg node 77.8381470494909 4.7746e-05 deg peri 2.09398040110964 5.5825e-05 deg M 214.9652950487483 3.0207e-05 deg tp 2459822.347477008907 (2022-Aug-30.84747701) 0.00013136 TDB period 1543.52774943384 4.23 9.6616e-06 2.645e-08 d yr n .2332319585002905 1.4599e-09 deg/d Q 2.820279424441127 1.1769e-08 au   Orbit Determination Parameters    # obs. used (total)      1409      data-arc span      16355 days (44.78 yr)      first obs. used      1975-11-06      last obs. used      2020-08-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50134      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:34:43   Additional Information  Earth MOID = 1.42261 au   Jupiter MOID = 2.35053 au   T_jup = 3.399  [ 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 14.72   n/a E2021B10   diameter diameter 2.827 km 0.587 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.384   0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18676 Zdeňkaplavcová           Discovered 1998 Mar. 30 by P. Pravec at Ondřejov. Czech radio astronomer Zdeňka Plavcová (b. 1930) was codesigner of the meteor radar of the Ondřejov Observatory that has been in operation since 1958. After 1969 she was a software specialist in the astronomy department of the University of California at Los Angeles. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010509/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  1998 FE73 = 1975 VT7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 09:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin