+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17540 (1993 FX81) Classification: Main-belt Asteroid          SPK-ID: 2017540 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .122351223028236 4.642e-08   a 2.94025125172554 1.3724e-08 au q 2.580507915066618 1.3497e-07 au i 6.621116579778329 3.2873e-06 deg node 83.00129683116459 4.2955e-05 deg peri 72.40587603442799 4.5109e-05 deg M 205.5453589910638 1.5826e-05 deg tp 2459990.584521773999 (2023-Feb-15.08452177) 8.3403e-05 TDB period 1841.514285233964 5.04 1.2893e-05 3.53e-08 d yr n .1954912882765187 1.3687e-09 deg/d Q 3.299994588384462 1.5403e-08 au   Orbit Determination Parameters    # obs. used (total)      2078      data-arc span      14244 days (39.00 yr)      first obs. used      1982-01-20      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45262      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:34:17   Additional Information  Earth MOID = 1.60009 au   Jupiter MOID = 1.72812 au   T_jup = 3.252  [ 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 12.95   n/a E2021B10   diameter diameter 7.043 km 0.370 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.356   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17540 (1993 FX81)          Discovered 1993-Mar-18 by UESAC at La Silla Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1993 FX81 = 1982 BL8 = 1986 WZ6 = 1996 XX18  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-12 20:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin