+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227211 (2005 QB156) Classification: Main-belt Asteroid          SPK-ID: 2227211 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1628096432093127 1.0529e-07   a 2.481346098675003 2.0572e-08 au q 2.077359025670905 2.5201e-07 au i 13.6210944354063 5.8184e-06 deg node 294.2075029665975 4.1121e-05 deg peri 112.3414953300183 4.6304e-05 deg M 292.9113420367319 2.1261e-05 deg tp 2459466.557831128377 (2021-Sep-09.05783113) 8.5546e-05 TDB period 1427.675289892619 3.91 1.7755e-05 4.861e-08 d yr n .2521581780875938 3.1359e-09 deg/d Q 2.8853331716791 2.3922e-08 au   Orbit Determination Parameters    # obs. used (total)      381      data-arc span      6964 days (19.07 yr)      first obs. used      2001-05-22      last obs. used      2020-06-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51823      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 02:28:24   Additional Information  Earth MOID = 1.1299 au   Jupiter MOID = 2.53265 au   T_jup = 3.421  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.94   n/a E2021B55   diameter diameter 3.618 km 0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.052   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   227211 (2005 QB156)          Discovered 2005-Aug-30 by NEAT at Palomar Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 01:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin