+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   27064 (1998 SY63) Classification: Main-belt Asteroid          SPK-ID: 2027064 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09335838313444665 4.1136e-08   a 2.315458841405897 7.8839e-09 au q 2.099291347757883 9.4323e-08 au i 6.965049747419344 4.3666e-06 deg node 53.96723623235508 2.7693e-05 deg peri 144.931491583707 3.2965e-05 deg M 237.1351997150367 1.9219e-05 deg tp 2459439.716860702252 (2021-Aug-13.21686070) 6.9452e-05 TDB period 1286.927333834294 3.52 6.5728e-06 1.8e-08 d yr n .2797360740854028 1.4287e-09 deg/d Q 2.531626335053911 8.62e-09 au   Orbit Determination Parameters    # obs. used (total)      2299      data-arc span      14899 days (40.79 yr)      first obs. used      1979-04-20      last obs. used      2020-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4305      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 00:56:32   Additional Information  Earth MOID = 1.09985 au   Jupiter MOID = 2.43018 au   T_jup = 3.566  [ 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 13.1   n/a MPO347724   diameter diameter 5.761 km 0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.404   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   27064 (1998 SY63)          Discovered 1998-Sep-20 by Elst, E. W. at La Silla Reference: 20010804/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 SY63 = 1979 HF2 = 1979 HX2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 01:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin