+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70338 (1999 RL170) Classification: Main-belt Asteroid          SPK-ID: 2070338 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1356267606006306 5.3878e-08   a 2.54600391732234 1.281e-08 au q 2.200697653539395 1.3725e-07 au i 10.70949463669546 6.6792e-06 deg node 349.9546509255435 1.7594e-05 deg peri 216.5265068515793 2.9004e-05 deg M 169.7825328101026 2.1414e-05 deg tp 2458300.694203411624 (2018-Jul-01.19420341) 8.7141e-05 TDB period 1483.839842662688 4.06 1.1199e-05 3.066e-08 d yr n .2426137846211187 1.8311e-09 deg/d Q 2.891310181105285 1.4548e-08 au   Orbit Determination Parameters    # obs. used (total)      821      data-arc span      7398 days (20.25 yr)      first obs. used      1999-09-04      last obs. used      2019-12-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52468      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 07:14:06   Additional Information  Earth MOID = 1.20781 au   Jupiter MOID = 2.10693 au   T_jup = 3.406  [ 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 15.1   n/a MPO436274   diameter diameter 2.739 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.215   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70338 (1999 RL170)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 RL170 = 2000 XF51  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-21 07:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin