+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4842 Atsushi (1989 WK) Classification: Main-belt Asteroid          SPK-ID: 2004842 [ 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 .1567145475637239 2.6791e-08   a 2.250968470093461 5.6699e-09 au q 1.898208964722556 5.9518e-08 au i 2.468582331474981 3.4209e-06 deg node 225.4690299042104 6.9657e-05 deg peri 77.93544161559821 7.0566e-05 deg M 117.0258870788191 1.1377e-05 deg tp 2458599.511437226285 (2019-Apr-26.01143723) 3.8806e-05 TDB period 1233.538033352493 3.38 4.6607e-06 1.276e-08 d yr n .2918434537616946 1.1027e-09 deg/d Q 2.603727975464365 6.5584e-09 au   Orbit Determination Parameters    # obs. used (total)      2503      data-arc span      26352 days (72.15 yr)      first obs. used      1948-09-07      last obs. used      2020-10-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46954      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:48:14   Additional Information  Earth MOID = .884812 au   Jupiter MOID = 2.61032 au   T_jup = 3.610  [ 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 13.5   n/a MPO337293   diameter diameter 4.596 km 0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.400   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4842 Atsushi (1989 WK)          Discovered 1989-Nov-21 by Ueda and Kaneda at Kushiro Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1989 WK = 1948 RE = 1962 XF1 = 1979 YF5 = 1985 OG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Dec-04 00:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin