+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   10290 Kettering (1985 SR) Classification: Main-belt Asteroid          SPK-ID: 2010290 [ 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 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .196107939617378 1.7529e-08   a 2.39043925871234 7.2071e-09 au q 1.92165514090577 4.1656e-08 au i 2.893552301762976 1.9633e-06 deg node 39.03430397991018 1.9173e-05 deg peri 250.0500342669849 2.1254e-05 deg M 234.3891877792372 6.6611e-06 deg tp 2459671.520185340855 (2022-Apr-02.02018534) 2.6007e-05 TDB period 1349.941646939525 3.70 6.105e-06 1.671e-08 d yr n .2666781936953808 1.206e-09 deg/d Q 2.859223376518909 8.6204e-09 au   Orbit Determination Parameters    # obs. used (total)      2277      data-arc span      16031 days (43.89 yr)      first obs. used      1977-04-24      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50155      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 21:59:05   Additional Information  Earth MOID = .905806 au   Jupiter MOID = 2.31978 au   T_jup = 3.504  [ 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 14.15   n/a E2021B10   diameter diameter 4.087 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.242   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   10290 Kettering           Discovered 1985 Sept. 17 at the Oak Ridge Observatory. The Kettering Group of amateur space sleuths, founded in the 1960s by G. E. Perry, monitored and analyzed radio transmissions from Soviet satellites, often scooping official news media. Perry's young students were eventually supplemented by a world-wide array of amateurs who continue the Group's work. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000320/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] Alternate Designations  1985 SR = 1977 HQ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 22:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin