+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16683 Alepieri (1994 JY) Classification: Main-belt Asteroid          SPK-ID: 2016683 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1135311056434384 3.7473e-08   a 3.041002619997506 1.5207e-08 au q 2.695754230284596 1.1608e-07 au i 3.892434760475902 3.7515e-06 deg node 93.93064146925704 7.0503e-05 deg peri 142.9414996553246 7.3356e-05 deg M 24.90772681136956 2.1216e-05 deg tp 2459262.484444368913 (2021-Feb-16.98444437) 0.00011397 TDB period 1936.973228932663 5.30 1.4529e-05 3.978e-08 d yr n .1858569827515747 1.3941e-09 deg/d Q 3.386251009710415 1.6933e-08 au   Orbit Determination Parameters    # obs. used (total)      2054      data-arc span      12661 days (34.66 yr)      first obs. used      1986-10-31      last obs. used      2021-06-30      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49403      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:41:33   Additional Information  Earth MOID = 1.68545 au   Jupiter MOID = 1.61553 au   T_jup = 3.227  [ 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 13.35   n/a E2021B10   diameter diameter 11.401 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.036   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   16683 Alepieri           Discovered 1994 May 3 by L. Tesi and G. Cattani at San Marcello Pistoiese. Alessandro Pieri (1969-2000) was an amateur astronomer from childhood and was for many years a member of the Associazione Astrofili Valdinievole, an organization of amateur astronomers in northern Tuscany. He was an active meteor observer and an astrophotographer. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010109/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  1994 JY = 1994 JO9 = 1999 GK22  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-28 08:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin