+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   277515 (2005 WB189) Classification: Main-belt Asteroid          SPK-ID: 2277515 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0322138464262658 7.6419e-08   a 2.617060760427945 2.2751e-08 au q 2.532755167003312 1.9521e-07 au i 22.83625748012559 5.6836e-06 deg node 78.79755811568006 1.2287e-05 deg peri 3.086681294296687 8.5099e-05 deg M 143.2320124163846 8.6986e-05 deg tp 2458385.242766121302 (2018-Sep-23.74276612) 0.00036968 TDB period 1546.390366648192 4.23 2.0165e-05 5.521e-08 d yr n .2328002086435016 3.0358e-09 deg/d Q 2.701366353852577 2.3484e-08 au   Orbit Determination Parameters    # obs. used (total)      252      data-arc span      6760 days (18.51 yr)      first obs. used      2001-12-19      last obs. used      2020-06-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58032      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 21:17:50   Additional Information  Earth MOID = 1.5485 au   Jupiter MOID = 2.5234 au   T_jup = 3.295  [ 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 16.0   n/a MPO326320   diameter diameter 2.215 km 0.313 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.172   0.091 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   277515 (2005 WB189)          Discovered 2005-Nov-30 by LINEAR at Socorro Reference: 20110517/Numbers.arc Last Updated: 2011-05-20 [ show close-approach data ] Alternate Designations  2005 WB189 = 2001 YF152  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 04:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin