+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   48772 (1997 MR9) Classification: Main-belt Asteroid          SPK-ID: 2048772 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1217685748114697 4.2291e-08   a 2.742716163204761 1.207e-08 au q 2.408739524898935 1.1442e-07 au i 12.08490976545073 4.9296e-06 deg node 179.4455476952764 1.5031e-05 deg peri 47.83664722026279 2.5421e-05 deg M 80.98674050782506 1.8761e-05 deg tp 2458627.266046513024 (2019-May-23.76604651) 8.6394e-05 TDB period 1659.089159691875 4.54 1.0952e-05 2.998e-08 d yr n .2169865301674679 1.4324e-09 deg/d Q 3.076692801510587 1.354e-08 au   Orbit Determination Parameters    # obs. used (total)      1158      data-arc span      9917 days (27.15 yr)      first obs. used      1993-09-16      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52921      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 03:50:00   Additional Information  Earth MOID = 1.41923 au   Jupiter MOID = 1.9325 au   T_jup = 3.306  [ 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 14.8   n/a MPO299292   diameter diameter 3.111 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.154   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   48772 (1997 MR9)          Discovered 1997-Jun-27 by Spacewatch at Kitt Peak Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 MR9 = 2000 AC194  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 21:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin