+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   8144 Hiragagennai (1982 VY2) Classification: Main-belt Asteroid          SPK-ID: 2008144 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05292094538943781 3.2415e-08   a 2.930087465940355 1.266e-08 au q 2.775024467169049 9.3782e-08 au i 3.019443367659832 3.5682e-06 deg node 123.0512772197567 7.2924e-05 deg peri 348.1736878157216 8.1432e-05 deg M 119.5568635602043 3.6606e-05 deg tp 2458392.097042712137 (2018-Sep-30.59704271) 0.00018571 TDB period 1831.973992135867 5.02 1.1873e-05 3.251e-08 d yr n .1965093399498986 1.2736e-09 deg/d Q 3.08515046471166 1.333e-08 au   Orbit Determination Parameters    # obs. used (total)      2491      data-arc span      13729 days (37.59 yr)      first obs. used      1982-11-14      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49798      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 16:46:37   Additional Information  Earth MOID = 1.79171 au   Jupiter MOID = 1.96384 au   T_jup = 3.272  [ 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 13.3   n/a MPO473878   diameter diameter 6.612 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.255   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   8144 Hiragagennai           Discovered 1982 Nov. 14 by H. Kosai and K. Hurukawa at the Kiso Station of the Tokyo Astronomical Observatory. Hiraga Gennai (1728-1779) was born in Takamatsu, Kagawa prefecture. He was a scientist, pharmacologist and playwright in the middle Edo period. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030106/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1982 VY2 = 1986 PU2 = 1989 CQ8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-30 07:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin