+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   284931 (2010 DR) Classification: Main-belt Asteroid          SPK-ID: 2284931 [ 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 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08107022747847284 1.0641e-07   a 2.385390857396642 4.1027e-08 au q 2.192006677962427 2.7559e-07 au i 11.5781918627317 1.1118e-05 deg node 318.9296351875487 4.2014e-05 deg peri 241.6180592431806 8.6025e-05 deg M 251.0364597415218 8.5879e-05 deg tp 2459407.801919528095 (2021-Jul-12.30191953) 0.00032772 TDB period 1345.667465303425 3.68 3.4717e-05 9.505e-08 d yr n .2675252313682313 6.9019e-09 deg/d Q 2.578775036830857 4.4353e-08 au   Orbit Determination Parameters    # obs. used (total)      131      data-arc span      7389 days (20.23 yr)      first obs. used      2000-07-31      last obs. used      2020-10-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50091      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 20:31:23   Additional Information  Earth MOID = 1.21772 au   Jupiter MOID = 2.45885 au   T_jup = 3.504  [ 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 17.0   n/a MPO503265   diameter diameter 2.875 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.037   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   284931 (2010 DR)          Discovered 2010-Feb-16 by Lowe, A. at Mayhill Reference: 20110813/Numbers.arc Last Updated: 2011-08-16 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2171-Sep-14 18:40 00:06 Amphi 0.0469412316762998 0.046668443200382 0.0472152151569983 3.8666449291469 3.86664489747426 2514258.277678069 6.0120933913069 18029.6389284432 140.321814463938 -40.9060175308336 32752.8383757013 T 10 CATAB v2.0f-lin.ifort 2020-Nov-11 20:31:23 2020-Nov-11 20:31 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 09:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin