+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   300419 (2007 RO321) Classification: Main-belt Asteroid          SPK-ID: 2300419 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1470828432217971 6.9557e-08   a 2.55399415072702 2.882e-08 au q 2.178345429466251 1.7174e-07 au i 12.49373991532116 8.6632e-06 deg node 2.390308026824638 2.3265e-05 deg peri 248.3037511068349 3.4696e-05 deg M 157.3705830019995 2.4941e-05 deg tp 2458348.797589639147 (2018-Aug-18.29758964) 0.00010278 TDB period 1490.830517714522 4.08 2.5234e-05 6.909e-08 d yr n .2414761407969354 4.0873e-09 deg/d Q 2.929642871987788 3.3059e-08 au   Orbit Determination Parameters    # obs. used (total)      429      data-arc span      6241 days (17.09 yr)      first obs. used      2003-09-21      last obs. used      2020-10-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53711      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 19:31:12   Additional Information  Earth MOID = 1.20143 au   Jupiter MOID = 2.19383 au   T_jup = 3.390  [ 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 15.7   n/a MPO440418   diameter diameter 2.270 km 0.549 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.197   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   300419 (2007 RO321)          Discovered 2007-Sep-14 by LINEAR at Socorro Reference: 20111012/Numbers.arc Last Updated: 2011-10-13 [ 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 2040-Jan-12 04:28 00:01 Psych 0.0379487292374684 0.0379455832101734 0.0379518878625444 6.44005174173451 6.44005169222752 2466165.686299106 1.17367832492224 1251.00133549544 75.1562217874601 83.6541814090964 75047.9515581505 T 18 CATAB v2.0f-lin.ifort 2020-Nov-11 19:31:13 2020-Nov-11 19:31 2085-Jan-02 02:05 00:01 Psych 0.0420818571533399 0.0420286907528446 0.0421350531725375 6.50012408532153 6.50012404108953 2482592.586901546 1.31126897107296 3182.50486459745 75.1198480502809 33.6001857843089 46388.6227196605 T 18 CATAB v2.0f-lin.ifort 2020-Nov-11 19:31:13 2020-Nov-11 19:31 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-16 16:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin