+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14551 Itagaki (1997 UN8) Classification: Main-belt Asteroid          SPK-ID: 2014551 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2209435096328654 3.3506e-08   a 2.748174257256995 1.168e-08 au q 2.140982991775942 9.3947e-08 au i 7.069950507313568 4.7801e-06 deg node 25.51647435430753 3.2756e-05 deg peri 259.5999105255233 3.4706e-05 deg M 54.82857849030215 1.095e-05 deg tp 2458747.063411939966 (2019-Sep-20.56341194) 5.0303e-05 TDB period 1664.044084559843 4.56 1.0609e-05 2.905e-08 d yr n .2163404223123234 1.3792e-09 deg/d Q 3.355365522738049 1.4261e-08 au   Orbit Determination Parameters    # obs. used (total)      2174      data-arc span      13146 days (35.99 yr)      first obs. used      1983-09-06      last obs. used      2019-09-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43341      source      ORB      producer      Otto Matic      solution date      2020-Jan-28 23:30:40   Additional Information  Earth MOID = 1.13865 au   Jupiter MOID = 1.87561 au   T_jup = 3.300  [ 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 13.5   n/a MPO492913   diameter diameter 10.364 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.94641 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] geometric albedo albedo 0.084   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   14551 Itagaki           Discovered 1997 Oct. 22 by T. Okuni at Nanyo. Koichi Itagaki (b. 1947), a confectionery manufacturing industry president, is also an amateur astronomer in Yamagata. He is credited with the discovery of supernovae 2001bq and 2001gd. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020128/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1997 UN8 = 1983 RY6 = 2000 DK101  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-04 09:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin