+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2084 Okayama (1935 CK) Classification: Main-belt Asteroid          SPK-ID: 2002084 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1031023578571843 3.3858e-08   a 2.394942857186995 7.1519e-09 au q 2.148018601677794 8.0536e-08 au i 4.839354906093751 3.5819e-06 deg node 148.9512126354603 4.0807e-05 deg peri 248.5196564494094 4.4286e-05 deg M 149.3153327560744 1.6863e-05 deg tp 2458639.008655252130 (2019-Jun-04.50865525) 6.3135e-05 TDB period 1353.758387555882 3.71 6.064e-06 1.66e-08 d yr n .2659263302146221 1.1912e-09 deg/d Q 2.641867112696196 7.8893e-09 au   Orbit Determination Parameters    # obs. used (total)      2972      data-arc span      32884 days (90.03 yr)      first obs. used      1931-01-13      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45958      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:00:19   Additional Information  Earth MOID = 1.15925 au   Jupiter MOID = 2.71982 au   T_jup = 3.517  [ 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 12.30   n/a E2021B10   diameter diameter 18.079 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.5470 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.083   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   2084 Okayama (1935 CK)          Discovered 1935-Feb-07 by Arend, S. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1935 CK = 1931 AD1 = 1939 GV = 1944 QN = 1948 RA1 = 1948 TH = 1950 EL = 1952 YC = 1959 SA = 1963 UV = 1965 HA = 1969 KD = 1970 PK = 1974 UK = 1976 GR  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 22:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin