+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1262675692965873 4.915e-08   a 2.728328398142634 1.5569e-08 au q 2.383829003066312 1.365e-07 au i 12.39255661727619 4.5519e-06 deg node 68.1509977403776 2.1283e-05 deg peri 314.9872949877398 2.6555e-05 deg M 229.5059912160493 1.7843e-05 deg tp 2459797.166237879143 (2022-Aug-05.66623788) 8.4176e-05 TDB period 1646.051398360517 4.51 1.409e-05 3.858e-08 d yr n .2187051998246005 1.8721e-09 deg/d Q 3.072827793218956 1.7535e-08 au   Orbit Determination Parameters    # obs. used (total)      971      data-arc span      8927 days (24.44 yr)      first obs. used      1995-12-17      last obs. used      2020-05-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52722      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:13:20   Additional Information  Earth MOID = 1.4053 au   Jupiter MOID = 2.38522 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-Apr-10 20:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin