+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4050 Mebailey (1976 SF) Classification: Main-belt Asteroid          SPK-ID: 2004050 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1384111029531782 1.9692e-08   a 3.187543956154638 1.4718e-08 au q 2.746352481471538 6.7279e-08 au i 1.475792703200965 9.2419e-07 deg node 146.1392726457469 2.1312e-05 deg peri 246.3651027752445 2.6801e-05 deg M 267.6427902385345 9.8863e-06 deg tp 2459733.774728782330 (2022-Jun-03.27472878) 5.8766e-05 TDB period 2078.656369735183 5.69 1.4397e-05 3.942e-08 d yr n .1731887988998698 1.1995e-09 deg/d Q 3.628735430837739 1.6755e-08 au   Orbit Determination Parameters    # obs. used (total)      2329      data-arc span      25739 days (70.47 yr)      first obs. used      1950-03-22      last obs. used      2020-09-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48407      source      ORB      producer      Otto Matic      solution date      2021-Mar-16 16:02:32   Additional Information  Earth MOID = 1.75162 au   Jupiter MOID = 1.80478 au   T_jup = 3.182  [ 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 12.64   n/a E2021B10   diameter diameter 16.604 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.069   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4050 Mebailey (1976 SF)          Discovered 1976-Sep-20 by Lagerkvist and Rickman at Kvistaberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1976 SF = 1954 XD = 1982 UW = 1982 VV5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 00:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin