+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18407 (1993 FQ24) Classification: Main-belt Asteroid          SPK-ID: 2018407 [ 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 .1228438010809638 3.9266e-08   a 2.808997734945486 1.443e-08 au q 2.463929775956964 1.1036e-07 au i 7.912246458311675 4.4287e-06 deg node 201.4736636032918 2.7025e-05 deg peri 152.4959909012415 3.0877e-05 deg M 160.8410436374341 1.6824e-05 deg tp 2458432.219355506006 (2018-Nov-09.71935551) 7.8021e-05 TDB period 1719.592373705952 4.71 1.325e-05 3.628e-08 d yr n .2093519403230149 1.6132e-09 deg/d Q 3.154065693934007 1.6202e-08 au   Orbit Determination Parameters    # obs. used (total)      1512      data-arc span      12997 days (35.58 yr)      first obs. used      1985-08-17      last obs. used      2021-03-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51517      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:28:42   Additional Information  Earth MOID = 1.46111 au   Jupiter MOID = 2.32096 au   T_jup = 3.297  [ 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 MPO452431   diameter diameter 4.348 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.490   0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18407 (1993 FQ24)          Discovered 1993-Mar-21 by UESAC at La Silla Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1993 FQ24 = 1985 QB1 = 1998 HM76  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 16:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin