+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11714 Mikebrown (1998 HQ51) Classification: Main-belt Asteroid          SPK-ID: 2011714 [ 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 .2563185553327311 3.3192e-08   a 2.671104639113584 1.1424e-08 au q 1.986450956873433 9.168e-08 au i 3.01630288365883 4.3105e-06 deg node 178.7191252685911 6.5746e-05 deg peri 135.1648321465815 6.6242e-05 deg M 293.2711432559336 9.2032e-06 deg tp 2459296.060207461403 (2021-Mar-22.56020746) 4.1591e-05 TDB period 1594.537653989802 4.37 1.023e-05 2.801e-08 d yr n .2257707738034403 1.4484e-09 deg/d Q 3.355758321353734 1.4352e-08 au   Orbit Determination Parameters    # obs. used (total)      1583      data-arc span      15622 days (42.77 yr)      first obs. used      1977-09-08      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52198      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:18:50   Additional Information  Earth MOID = .974025 au   Jupiter MOID = 1.9588 au   T_jup = 3.331  [ 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 14.1   n/a MPO389700   diameter diameter 4.451 km 0.945 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.246   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11714 Mikebrown           Discovered 1998 Apr. 28 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Michael E. Brown (b. 1965) is assistant professor of astronomy at the California Institute of Technology. He is best known for his work on the Kuiper belt, cometary comae and the atmospheres of planetary satellites. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020724/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1998 HQ51 = 1977 RX8 = 1986 TH5 = 1986 TW10 = 1986 UR1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-21 18:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin