+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .212548748484278 4.8287e-08   a 3.004690400396109 1.6985e-08 au q 2.366047216209192 1.4506e-07 au i 2.78944248107085 4.7756e-06 deg node 319.5279854368177 0.00010333 deg peri 40.96400597845553 0.00010382 deg M 346.4349740469655 1.2628e-05 deg tp 2459468.182996147237 (2021-Sep-10.68299615) 6.7086e-05 TDB period 1902.383283478538 5.21 1.613e-05 4.416e-08 d yr n .189236313799885 1.6045e-09 deg/d Q 3.643333584583027 2.0595e-08 au   Orbit Determination Parameters    # obs. used (total)      1007      data-arc span      11218 days (30.71 yr)      first obs. used      1990-10-20      last obs. used      2021-07-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5828      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 10:06:59   Additional Information  Earth MOID = 1.36292 au   Jupiter MOID = 1.82525 au   T_jup = 3.215  [ 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 14.26   n/a E2021B10   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 ] 2021-Jul-31 00:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin