+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78559 (2002 RG154) Classification: Main-belt Asteroid          SPK-ID: 2078559 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1445259102183679 5.8166e-08   a 2.564098404047494 1.3425e-08 au q 2.193519748313066 1.5398e-07 au i 14.72698095864474 5.3586e-06 deg node 206.4700937831756 1.8646e-05 deg peri 166.0487138752556 2.51e-05 deg M 114.9456455860619 1.8385e-05 deg tp 2458521.659933482670 (2019-Feb-07.15993348) 7.4698e-05 TDB period 1499.68642193734 4.11 1.1778e-05 3.225e-08 d yr n .2400501829808802 1.8853e-09 deg/d Q 2.934677059781922 1.5365e-08 au   Orbit Determination Parameters    # obs. used (total)      844      data-arc span      7713 days (21.12 yr)      first obs. used      1998-12-14      last obs. used      2020-01-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54259      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 18:26:40   Additional Information  Earth MOID = 1.19764 au   Jupiter MOID = 2.53593 au   T_jup = 3.373  [ 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 15.0   n/a MPO449494   diameter diameter 2.451 km 0.308 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.294   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   78559 (2002 RG154)          Discovered 2002-Sep-14 by Ametlla de Mar at Ametlla de Mar Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ 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 2127-Nov-10 02:22 00:03 Hygie 0.0381369529380375 0.0381126600161103 0.0381612460303612 4.9335662717404 4.93356606639004 2498243.598497844 3.1331382168149 1216.74290334151 49.3530758493899 6.02313941010484 12976.3382210843 T 24 CATAB v2.0f-lin.ifort 2020-Feb-23 18:26:56 2020-Feb-23 18:26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 20:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin