+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5054 Keil (1986 AO2) Classification: Main-belt Asteroid          SPK-ID: 2005054 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1486509400491749 2.5438e-08   a 2.453534594252961 7.985e-09 au q 2.088814370374088 6.281e-08 au i 7.457458495836164 6.3915e-06 deg node 355.0027424525106 2.2217e-05 deg peri 86.30539168361099 3.438e-05 deg M 111.3429252115992 2.4399e-05 deg tp 2458962.342975878165 (2020-Apr-22.84297588) 9.4706e-05 TDB period 1403.740097422716 3.84 6.8527e-06 1.876e-08 d yr n .2564577307871767 1.252e-09 deg/d Q 2.818254818131834 9.172e-09 au   Orbit Determination Parameters    # obs. used (total)      2020      data-arc span      24324 days (66.60 yr)      first obs. used      1954-11-04      last obs. used      2021-06-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46921      source      ORB      producer      Otto Matic      solution date      2021-Jul-07 23:37:00   Additional Information  Earth MOID = 1.12007 au   Jupiter MOID = 2.43019 au   T_jup = 3.467  [ 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 14.35   n/a MPCxxxxx   diameter diameter 4.379 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.231   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   5054 Keil (1986 AO2)          Discovered 1986-Jan-12 by Bowell, E. at Flagstaff Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1986 AO2 = 1988 TA5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-29 17:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin