+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15996 (1998 YC12) Classification: Main-belt Asteroid          SPK-ID: 2015996 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1698046635473455 2.9067e-08   a 2.299948473990118 7.4493e-09 au q 1.909406497187995 6.8348e-08 au i 7.272567872769311 4.0833e-06 deg node 314.0800989163908 2.5311e-05 deg peri 291.1758518691242 2.7976e-05 deg M 298.9637613910272 1.2643e-05 deg tp 2459216.503529760500 (2021-Jan-02.00352976) 4.5036e-05 TDB period 1274.018066741559 3.49 6.1896e-06 1.695e-08 d yr n .2825705611229984 1.3728e-09 deg/d Q 2.690490450792241 8.7142e-09 au   Orbit Determination Parameters    # obs. used (total)      1925      data-arc span      13932 days (38.14 yr)      first obs. used      1982-04-20      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49348      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:30:01   Additional Information  Earth MOID = .910318 au   Jupiter MOID = 2.38753 au   T_jup = 3.562  [ hide covariance matrix ] Orbital Elements at Epoch 2456943.5 (2014-Oct-13.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1700606241705226 2.9012e-08   q 1.908929279226977 6.8254e-08 au tp 2456668.445248396085 (2014-Jan-10.94524840) 4.3112e-05 TDB node 314.1274070927663 2.5299e-05 deg peri 291.1729971564789 2.7965e-05 deg i 7.27460131060166 4.0841e-06 deg   Orbit Determination Parameters    # obs. used (total)      1925      data-arc span      13932 days (38.14 yr)      first obs. used      1982-04-20      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49348      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:30:01   Additional Information  Jupiter MOID = 2.38753 au   T_jup = 3.562  Orbit Covariance (6×6)   e q tp node peri i e 8.417223800596166E-16 -1.972449673288614E-15 9.387312852659729E-14 3.304767560750478E-15 2.725191022163932E-14 -1.304342024178106E-15 q -1.972449673288614E-15 4.658605802449812E-15 -2.126789664511861E-13 -7.209787675460756E-15 -6.12336115875345E-14 3.3087155688326E-15 tp 9.387312852659729E-14 -2.126789664511861E-13 1.858621868530911E-9 2.327861182209667E-12 5.220338123467956E-10 1.698158765110369E-12 node 3.304767560750478E-15 -7.209787675460756E-15 2.327861182209667E-12 6.40046286249424E-10 -6.336370192156694E-10 5.547927949722536E-13 peri 2.725191022163932E-14 -6.12336115875345E-14 5.220338123467956E-10 -6.336370192156694E-10 7.82041547742311E-10 -8.06909044789265E-14 i -1.304342024178106E-15 3.3087155688326E-15 1.698158765110369E-12 5.547927949722536E-13 -8.06909044789265E-14 1.668017449288084E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.36   n/a E2021B10   diameter diameter 5.093 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.143   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15996 (1998 YC12)          Discovered 1998-Dec-27 by Kobayashi, T. at Oizumi Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-01 17:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin