+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   6580 Philbland (1981 EW21) Classification: Main-belt Asteroid          SPK-ID: 2006580 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .122207177794297 3.7987e-08   a 2.628584020952568 1.1126e-08 au q 2.307352186156769 1.0106e-07 au i 1.0897440992139 3.9645e-06 deg node 219.3291138568929 0.00025723 deg peri 1.979397245763535 0.00025807 deg M 86.47179622052901 2.2018e-05 deg tp 2458826.601948643732 (2019-Dec-09.10194864) 9.4862e-05 TDB period 1556.615039486142 4.26 9.8826e-06 2.706e-08 d yr n .2312710534512378 1.4683e-09 deg/d Q 2.949815855748367 1.2485e-08 au   Orbit Determination Parameters    # obs. used (total)      1572      data-arc span      25350 days (69.40 yr)      first obs. used      1951-02-04      last obs. used      2020-07-01      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52015      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 18:53:28   Additional Information  Earth MOID = 1.29786 au   Jupiter MOID = 2.02364 au   T_jup = 3.390  [ 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 14.44   n/a E2021B10   diameter diameter 7.430 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.061   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   6580 Philbland           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey. Philip A. Bland (b. 1969), a research scientist at London's Imperial College, is involved in a variety of planetary and meteoritical studies. His fireball camera network offers an important glimpse into links between meteorites and minor planets. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060809/MPCPages.arc Last Updated: 2007-08-08 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-14 13:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin