+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74226 (1998 SZ12) Classification: Main-belt Asteroid          SPK-ID: 2074226 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07913227992688143 4.7136e-08   a 2.687346202565496 2.01e-08 au q 2.474690370603641 1.3535e-07 au i 13.44604698935099 5.8439e-06 deg node 90.34606700104575 2.0669e-05 deg peri 206.9209845589463 4.3885e-05 deg M 28.56925327946025 3.912e-05 deg tp 2458872.803132541775 (2020-Jan-24.30313254) 0.00017487 TDB period 1609.103039385755 4.41 1.8053e-05 4.943e-08 d yr n .2237271269697081 2.5101e-09 deg/d Q 2.900002034527351 2.1691e-08 au   Orbit Determination Parameters    # obs. used (total)      811      data-arc span      7612 days (20.84 yr)      first obs. used      1998-09-21      last obs. used      2019-07-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55426      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 17:13:00   Additional Information  Earth MOID = 1.46498 au   Jupiter MOID = 2.25017 au   T_jup = 3.330  [ 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 14.8   n/a MPO474628   diameter diameter 2.885 km 0.448 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.307   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   74226 (1998 SZ12)          Discovered 1998-Sep-21 by Tucker, R. A. at Goodricke-Pigott Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 SZ12 = 2001 FK151  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-09 01:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin