+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   277473 (2005 WD1) Classification: Amor [NEO]          SPK-ID: 2277473 [ 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 75 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4418323072725767 7.7651e-08   a 2.199242764503207 3.6628e-08 au q 1.227546259610235 1.7271e-07 au i 43.08049770853855 2.0082e-05 deg node 52.31034924562369 1.19e-05 deg peri 285.8881926920108 2.0194e-05 deg M 215.7027057839979 3.6927e-05 deg tp 2459477.989549985812 (2021-Sep-20.48954999) 0.00013344 TDB period 1191.264458067917 3.26 2.9761e-05 8.148e-08 d yr n .3021998999146465 7.5497e-09 deg/d Q 3.170939269396179 5.2812e-08 au   Orbit Determination Parameters    # obs. used (total)      214      data-arc span      5800 days (15.88 yr)      first obs. used      2004-04-17      last obs. used      2020-03-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55837      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 21:18:08   Additional Information  Earth MOID = .496743 au   Jupiter MOID = 3.10941 au   T_jup = 3.218  [ hide covariance matrix ] Orbital Elements at Epoch 2455504.5 (2010-Nov-04.0) TDB Reference: JPL 75 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4424044905679588 7.818e-08   q 1.226665936694231 1.7385e-07 au tp 2455904.102019019006 (2011-Dec-08.60201902) 5.6108e-05 TDB node 52.3747726484731 1.192e-05 deg peri 285.9444594188435 2.0125e-05 deg i 43.06127496865945 2.0084e-05 deg   Orbit Determination Parameters    # obs. used (total)      214      data-arc span      5800 days (15.88 yr)      first obs. used      2004-04-17      last obs. used      2020-03-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55837      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 21:18:08   Additional Information  Jupiter MOID = 3.10941 au   T_jup = 3.218  Orbit Covariance (6×6)   e q tp node peri i e 6.112076369561872E-15 -1.349817323465031E-14 1.411360165757871E-12 2.154975681343057E-14 7.093807884624689E-13 -9.798089136090631E-14 q -1.349817323465031E-14 3.022553720976862E-14 -2.345573199372165E-12 -3.808965913431316E-14 -1.415167464389031E-12 2.189996995339469E-13 tp 1.411360165757871E-12 -2.345573199372165E-12 3.148092443808644E-9 5.441483402705411E-11 8.860605286786305E-10 -5.352549451142247E-12 node 2.154975681343057E-14 -3.808965913431316E-14 5.441483402705411E-11 1.420838012718203E-10 -8.757483203129148E-11 -7.286165080094325E-11 peri 7.093807884624689E-13 -1.415167464389031E-12 8.860605286786305E-10 -8.757483203129148E-11 4.050124615036626E-10 4.203242382719594E-11 i -9.798089136090631E-14 2.189996995339469E-13 -5.352549451142247E-12 -7.286165080094325E-11 4.203242382719594E-11 4.033740180428446E-10 [ 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 16.9   n/a MPO310779   277473 (2005 WD1)          Discovered 2005-Nov-21 by LINEAR at Socorro Reference: 20110517/Numbers.arc Last Updated: 2011-05-20 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 02:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin