+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11456 Cotto-Figueroa (1981 EK9) Classification: Main-belt Asteroid          SPK-ID: 2011456 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08266089292129813 3.5468e-08   a 3.069011177130178 1.8994e-08 au q 2.815323972843153 1.154e-07 au i 2.891607903971309 3.5702e-06 deg node 288.2288317810676 8.8681e-05 deg peri 29.21002741087351 9.2474e-05 deg M 5.920140969690063 2.7199e-05 deg tp 2459168.205714566427 (2020-Nov-14.70571457) 0.0001483 TDB period 1963.794919007651 5.38 1.8231e-05 4.991e-08 d yr n .1833185311335442 1.7018e-09 deg/d Q 3.322698381417203 2.0564e-08 au   Orbit Determination Parameters    # obs. used (total)      1394      data-arc span      14495 days (39.69 yr)      first obs. used      1981-02-09      last obs. used      2020-10-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54491      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:47:12   Additional Information  Earth MOID = 1.8003 au   Jupiter MOID = 1.9095 au   T_jup = 3.224  [ 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 13.86   n/a E2021B10   diameter diameter 11.196 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.035   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11456 Cotto-Figueroa           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring. Desiree Cotto-Figueroa (b. 1984) is a professor at the University of Puerto Rico, Humacao whose research includes shape and spin evolution of near-Earth asteroids in response to re-radiation of solar flux. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2017-03-12 Last Updated: 2017-04-19 [ show close-approach data ] Alternate Designations  1981 EK9 = 1998 KN48  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 18:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin