+ 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 74 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4418323080561345 7.7651e-08   a 2.199242764482245 3.6628e-08 au q 1.227546257875301 1.7271e-07 au i 43.08049788134012 2.0082e-05 deg node 52.31034927285647 1.19e-05 deg peri 285.8881928920912 2.0194e-05 deg M 215.7027055908101 3.6927e-05 deg tp 2459477.989550618257 (2021-Sep-20.48955062) 0.00013344 TDB period 1191.264458050885 3.26 2.9761e-05 8.148e-08 d yr n .3021998999189671 7.5497e-09 deg/d Q 3.17093927108919 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      .55836      source      ORB      producer      Otto Matic      solution date      2020-Mar-05 05:06:28   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 74 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4424044913582584 7.818e-08   q 1.226665934943018 1.7385e-07 au tp 2455904.102019691109 (2011-Dec-08.60201969) 5.6108e-05 TDB node 52.37477267580118 1.192e-05 deg peri 285.9444596181673 2.0125e-05 deg i 43.0612751410528 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      .55836      source      ORB      producer      Otto Matic      solution date      2020-Mar-05 05:06:28   Additional Information  Jupiter MOID = 3.10941 au   T_jup = 3.218  Orbit Covariance (6×6)   e q tp node peri i e 6.112076358892347E-15 -1.34981732057925E-14 1.411360153381856E-12 2.154975397858491E-14 7.09380781955568E-13 -9.798088678451674E-14 q -1.34981732057925E-14 3.022553712954976E-14 -2.345573180635662E-12 -3.808965286578087E-14 -1.415167452198804E-12 2.189996890752553E-13 tp 1.411360153381856E-12 -2.345573180635662E-12 3.148092405626077E-9 5.441483338457521E-11 8.860605154298822E-10 -5.352545815619436E-12 node 2.154975397858491E-14 -3.808965286578087E-14 5.441483338457521E-11 1.420838006753378E-10 -8.757483184700819E-11 -7.286165030094015E-11 peri 7.09380781955568E-13 -1.415167452198804E-12 8.860605154298822E-10 -8.757483184700819E-11 4.050124564362764E-10 4.203242488366006E-11 i -9.798088678451674E-14 2.189996890752553E-13 -5.352545815619436E-12 -7.286165030094015E-11 4.203242488366006E-11 4.033740146142043E-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 ] 2020-Sep-20 11:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin