+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18638 Nouet (1998 EP3) Classification: Main-belt Asteroid          SPK-ID: 2018638 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1803942208960508 2.9023e-08   a 2.651212061692672 1.2593e-08 au q 2.17294872739341 8.1549e-08 au i 9.419495602212304 6.3569e-07 deg node 6.233463002066245 3.981e-06 deg peri 301.8650141533449 5.4578e-06 deg M 356.4400951381298 3.0709e-06 deg tp 2459216.091970991126 (2021-Jan-01.59197099) 1.3518e-05 TDB period 1576.758305236445 4.32 1.1234e-05 3.076e-08 d yr n .2283165395764418 1.6267e-09 deg/d Q 3.129475395991934 1.4864e-08 au   Orbit Determination Parameters    # obs. used (total)      1864      data-arc span      10035 days (27.47 yr)      first obs. used      1993-03-22      last obs. used      2020-09-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50298      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:33:58   Additional Information  Earth MOID = 1.17439 au   Jupiter MOID = 2.21954 au   T_jup = 3.348  [ 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 13.55   n/a E2021B10   diameter diameter 8.675 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.102   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18638 Nouet           Discovered 1998 Mar. 2 by the OCA-DLR Asteroid Survey at Caussols. Nicolas Nouet, an astronomer at the Observatoire de Paris, traveled to St. Domingue to map the island. Later he mapped the Rhine region and traveled with Napoleon Bonaparte to Egypt, where he created a map of that country. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030614/MPCPages.arc Last Updated: 2005-04-26 [ show close-approach data ] Alternate Designations  1998 EP3 = 1969 TY = 1996 XB32  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 17:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin