+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227841 (2007 DY4) Classification: Main-belt Asteroid          SPK-ID: 2227841 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1728546361786918 5.6225e-08   a 2.324025656646319 1.437e-08 au q 1.922307047296774 1.312e-07 au i 5.323265549512098 6.2131e-06 deg node 154.4409302284572 5.2641e-05 deg peri 52.39969453372891 5.6768e-05 deg M 265.5087145426597 1.8487e-05 deg tp 2459540.163640960472 (2021-Nov-21.66364096) 6.762e-05 TDB period 1294.076063776007 3.54 1.2003e-05 3.286e-08 d yr n .2781907571565383 2.5802e-09 deg/d Q 2.725744265995864 1.6854e-08 au   Orbit Determination Parameters    # obs. used (total)      195      data-arc span      7656 days (20.96 yr)      first obs. used      2000-02-02      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52555      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 22:50:57   Additional Information  Earth MOID = .923032 au   Jupiter MOID = 2.23908 au   T_jup = 3.550  [ 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 17.5   n/a MPO440187   227841 (2007 DY4)          Discovered 2007-Feb-17 by Spacewatch at Kitt Peak Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 12:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin