+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58660 (1997 XR) Classification: Main-belt Asteroid          SPK-ID: 2058660 [ 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 .1462148773876225 3.292e-08   a 2.256420554096197 7.0531e-09 au q 1.926498299444111 7.7393e-08 au i 6.642990990408792 3.4495e-06 deg node 278.57138860 2.8549e-05 deg peri 94.9558053015261 3.1331e-05 deg M 291.826684028119 1.2247e-05 deg tp 2459234.944697987315 (2021-Jan-20.44469799) 4.232e-05 TDB period 1238.022385624388 3.39 5.8047e-06 1.589e-08 d yr n .2907863413297139 1.3634e-09 deg/d Q 2.586342808748284 8.0844e-09 au   Orbit Determination Parameters    # obs. used (total)      1367      data-arc span      9903 days (27.11 yr)      first obs. used      1993-09-18      last obs. used      2020-10-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49309      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:50:12   Additional Information  Earth MOID = .940812 au   Jupiter MOID = 2.92149 au   T_jup = 3.600  [ 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 15.4   n/a MPO266215   diameter diameter 1.586 km 0.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.443   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   58660 (1997 XR)          Discovered 1997-Dec-03 by Kobayashi, T. at Oizumi Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 XR = 2000 RU60  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 11:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin