+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17462 Takahisa (1990 UP1) Classification: Main-belt Asteroid          SPK-ID: 2017462 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1780795962265666 3.6127e-08   a 2.272731222457229 8.2552e-09 au q 1.868004164030535 8.2887e-08 au i 8.859852693071664 3.8831e-06 deg node 55.82466088898769 2.5041e-05 deg peri 354.5605308338879 2.726e-05 deg M 223.1162624755793 1.113e-05 deg tp 2459476.349807911086 (2021-Sep-18.84980791) 3.9802e-05 TDB period 1251.470291110581 3.43 6.8185e-06 1.867e-08 d yr n .2876616429148537 1.5673e-09 deg/d Q 2.677458280883923 9.7252e-09 au   Orbit Determination Parameters    # obs. used (total)      1603      data-arc span      10433 days (28.56 yr)      first obs. used      1990-10-16      last obs. used      2019-05-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49749      source      ORB      producer      Otto Matic      solution date      2019-May-30 02:31:08   Additional Information  Earth MOID = .878963 au   Jupiter MOID = 2.69519 au   T_jup = 3.575  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.4   n/a MPO332981   diameter diameter 2.814 km 0.538 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   geometric albedo albedo 0.398   0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   17462 Takahisa           Discovered 1990 Oct. 22 by K. Endate and K. Watanabe at Kitami. Takahisa Morita (b. 1933) is a Japanese amateur astronomer who regularly opens his personal telescope to the public. He is particularly skilled at sunspot and prominence photography, and his images often grace the pages of Japanese astronomical magazines. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20121228/MPCPages.arc Last Updated: 2013-01-02 Alternate Designations  1990 UP1 = 1990 UP14 = 1999 JB27  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-21 07:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin