+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15736 Hamanasu (1990 XN) Classification: Main-belt Asteroid          SPK-ID: 2015736 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1582928839299425 2.727e-08   a 2.467391642415301 7.9263e-09 au q 2.076821103552745 6.8019e-08 au i 6.323798411835106 3.5131e-06 deg node 86.32092113853969 3.6711e-05 deg peri 18.7428541940688 4.0039e-05 deg M 195.6332998134711 1.6812e-05 deg tp 2459646.848725092458 (2022-Mar-08.34872509) 6.7522e-05 TDB period 1415.648916533735 3.88 6.8215e-06 1.868e-08 d yr n .2543003394383067 1.2254e-09 deg/d Q 2.857962181277856 9.181e-09 au   Orbit Determination Parameters    # obs. used (total)      1970      data-arc span      25170 days (68.91 yr)      first obs. used      1951-09-08      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48463      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:01:38   Additional Information  Earth MOID = 1.09479 au   Jupiter MOID = 2.28353 au   T_jup = 3.460  [ 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 13.8   n/a MPO473978   diameter diameter 7.827 km 2.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.036   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   15736 Hamanasu           Discovered 1990 Dec. 8 by K. Endate and K. Watanabe at Kitami. Hamanasu, the name of a Japanese rose, is also the name of a sleeper train that connects Aomori and Sapporo (a 480-km distance) in 7.5 hours. Hamanasu is the only sleeper express train that passes through Seikan, the longest tunnel in the world. The train will be retired in the spring of 2016. 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 2015-11-25 Last Updated: 2015-11-30 [ show close-approach data ] Alternate Designations  1990 XN = 1998 UK32  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-29 05:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin