+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21250 Kamikouchi (1995 YQ2) Classification: Main-belt Asteroid          SPK-ID: 2021250 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1262140346262314 4.8092e-08   a 2.729270273391884 1.5361e-08 au q 2.384798060601657 1.3401e-07 au i 12.39013368776006 4.5112e-06 deg node 68.14733352298106 2.1e-05 deg peri 314.8266583041943 2.6335e-05 deg M 272.5389211582276 1.7992e-05 deg tp 2459796.611075884971 (2022-Aug-05.11107589) 8.4046e-05 TDB period 1646.903848272613 4.51 1.3904e-05 3.807e-08 d yr n .2185919963558243 1.8454e-09 deg/d Q 3.073742486182111 1.73e-08 au   Orbit Determination Parameters    # obs. used (total)      1003      data-arc span      9311 days (25.49 yr)      first obs. used      1995-12-17      last obs. used      2021-06-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52568      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 05:06:45   Additional Information  Earth MOID = 1.40678 au   Jupiter MOID = 2.38601 au   T_jup = 3.310  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.76   n/a E2021B10   diameter diameter 2.852 km 0.559 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.344   0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21250 Kamikouchi           Discovered 1995 Dec. 17 by N. Sato at Chichibu. Kamikouchi is a Japanese scenic point nominated as a "Special Natural Treasure" in 1952. Kamikouchi was introduced to the world in Mountaineering and Exploration in the Japanese Alps, published in London in 1896 and written by Walter Weston (1861-1940), a British clergyman and a mountaineer. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050523/MPCPages.arc Last Updated: 2005-07-21 Alternate Designations  1995 YQ2 = 2000 WU  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 07:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin