+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58184 Masayukiyamamoto (1991 RG1) Classification: Main-belt Asteroid          SPK-ID: 2058184 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1981170303661789 3.0068e-08   a 2.384859724425386 7.1848e-09 au q 1.912378397982325 7.3995e-08 au i 1.741669326480908 3.758e-06 deg node 31.9416810155733 0.00010268 deg peri 294.4207911991895 0.00010314 deg M 301.6649007144437 9.6738e-06 deg tp 2459218.481745738449 (2021-Jan-03.98174574) 3.645e-05 TDB period 1345.218049286349 3.68 6.079e-06 1.664e-08 d yr n .2676146073054725 1.2093e-09 deg/d Q 2.857341050868446 8.6082e-09 au   Orbit Determination Parameters    # obs. used (total)      1229      data-arc span      10603 days (29.03 yr)      first obs. used      1991-08-08      last obs. used      2020-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53239      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:52:01   Additional Information  Earth MOID = .901515 au   Jupiter MOID = 2.48085 au   T_jup = 3.508  [ 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 15.5   n/a MPO436189   58184 Masayukiyamamoto           Discovered 1991 Sept. 7 by T. Seki at Geisei. Masayuki Yamamoto (b. 1971) is a Japanese planetary scientist. He specializes in upper atmospheric physics, developing in-situ and remote-sensing equipment, and collaborating with JAXA and NASA, as well as with amateur astronomers and high school students. 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 2014-09-09 Last Updated: 2014-11-10 [ show close-approach data ] Alternate Designations  1991 RG1 = 2002 PG84  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 19:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin