+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3995 Sakaino (1988 XM) Classification: Main-belt Asteroid          SPK-ID: 2003995 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09500803807292645 4.0447e-08   a 2.634420965912798 1.1178e-08 au q 2.384129798483239 1.0552e-07 au i 9.29946677161742 3.6704e-06 deg node 99.82543339794545 2.4973e-05 deg peri 276.6356251963299 3.2513e-05 deg M 174.8665237884472 2.2637e-05 deg tp 2458241.869386931970 (2018-May-03.36938693) 9.7197e-05 TDB period 1561.802766977255 4.28 9.9399e-06 2.721e-08 d yr n .2305028570904323 1.467e-09 deg/d Q 2.884712133342356 1.224e-08 au   Orbit Determination Parameters    # obs. used (total)      2379      data-arc span      22427 days (61.40 yr)      first obs. used      1958-12-04      last obs. used      2020-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41401      source      ORB      producer      Otto Matic      solution date      2020-May-20 02:02:16   Additional Information  Earth MOID = 1.40772 au   Jupiter MOID = 2.56402 au   T_jup = 3.373  [ 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 12.2   n/a MPO502191   diameter diameter 9.487 km 0.480 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 4.5529 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Ditteon, R.; Trent, L. (2018) Minor Planet Bull. 45, 328-329.] [Marchini, A.; Papini, R.; Banfi, M.; Salvaggio, F. (2019) Minor Planet Bull. 46, 213-214.] geometric albedo albedo 0.311   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   3995 Sakaino           Discovered 1988 Dec. 5 by T. Kojima at Chiyoda. Named in honor of Teruo Sakaino (b. 1917), a glass and ceramics chemist, professor emeritus of the Tokyo Institute of Technology and of the Wuhan (China) University of Engineering, known for his research on amorphous materials. In particular, he developed quantitative methods for estimating the quality of optical glass. He is also an amateur astronomer and a former teacher of the discoverer at the T.I.T. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19961026/MPCPages.arc Last Updated: 2003-09-26 [ show close-approach data ] Alternate Designations  1988 XM = 1958 XE = 1978 JB1 = 1981 CF = 1984 YV4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-11 13:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin