+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17461 Shigosenger (1990 UD1) Classification: Main-belt Asteroid          SPK-ID: 2017461 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2130665478183202 5.6869e-08   a 3.002679951305602 1.773e-08 au q 2.362909299877636 1.6838e-07 au i 2.789579199108877 5.1118e-06 deg node 319.5385390845247 0.0001089 deg peri 41.30397850417501 0.00010943 deg M 271.2194462695439 1.3609e-05 deg tp 2459469.180993501712 (2021-Sep-11.68099350) 7.4384e-05 TDB period 1900.474265714513 5.20 1.6833e-05 4.609e-08 d yr n .1894264008171941 1.6778e-09 deg/d Q 3.642450602733569 2.1508e-08 au   Orbit Determination Parameters    # obs. used (total)      959      data-arc span      10827 days (29.64 yr)      first obs. used      1990-10-20      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58432      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 18:10:37   Additional Information  Earth MOID = 1.36072 au   Jupiter MOID = 1.8255 au   T_jup = 3.216  [ 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 14.3   n/a MPO439214   diameter diameter 6.929 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.064   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17461 Shigosenger           Discovered 1990 Oct. 20 by T. Seki at Geisei. Shigosenger is a team of original characters introduced by Akashi Municipal Planetarium to promote astronomy education for children. The Planetarium is situated on the Japan Standard Time Meridian and "Shigosen" is a Japanese term for the meridian. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2018-05-29 Last Updated: 2018-09-17 [ show close-approach data ] Alternate Designations  1990 UD1 = 2000 PR8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-25 08:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin