+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   7420 Buffon (1991 RP11) Classification: Main-belt Asteroid          SPK-ID: 2007420 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1527102716059719 4.0262e-08   a 2.438712736777014 8.6009e-09 au q 2.066296252374853 9.6742e-08 au i 1.414070352843006 3.4691e-06 deg node 118.3942107611076 0.00015076 deg peri 208.1506018520724 0.0001511 deg M 245.0795793528863 1.1043e-05 deg tp 2459644.552278486237 (2022-Mar-06.05227849) 4.3446e-05 TDB period 1391.039289230624 3.81 7.3589e-06 2.015e-08 d yr n .2587993040794081 1.3691e-09 deg/d Q 2.811129221179175 9.9144e-09 au   Orbit Determination Parameters    # obs. used (total)      1787      data-arc span      24357 days (66.69 yr)      first obs. used      1953-10-01      last obs. used      2020-06-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55074      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:28:17   Additional Information  Earth MOID = 1.05274 au   Jupiter MOID = 2.50664 au   T_jup = 3.486  [ 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 MPO467731   diameter diameter 6.268 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.063   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   7420 Buffon (1991 RP11)          Discovered 1991-Sep-04 by Elst, E. W. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1991 RP11 = 1976 SU7 = 2105 T-1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-04 20:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin