+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1587323802415331 1.4623e-08   a 2.465632720075291 7.5093e-09 au q 2.074256969616334 3.6332e-08 au i 6.32132757405018 4.4009e-07 deg node 86.29618704794886 6.8826e-06 deg peri 19.03326717158613 8.3695e-06 deg M 246.2083767572296 6.7434e-06 deg tp 2459647.491017485962 (2022-Mar-08.99101749) 2.7759e-05 TDB period 1414.135432022408 3.87 6.4603e-06 1.769e-08 d yr n .2545725054672808 1.163e-09 deg/d Q 2.857008470534247 8.7013e-09 au   Orbit Determination Parameters    # obs. used (total)      2140      data-arc span      25298 days (69.26 yr)      first obs. used      1951-09-08      last obs. used      2020-12-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47997      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:07:34   Additional Information  Earth MOID = 1.09209 au   Jupiter MOID = 2.28344 au   T_jup = 3.461  [ 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 13.77   n/a E2021B10   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 ] 2021-Apr-16 12:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin