+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08197582527532603 3.514e-08   a 3.066326307334402 1.8237e-08 au q 2.814961677727222 1.1359e-07 au i 2.890798476938403 3.546e-06 deg node 288.2057154457911 8.8692e-05 deg peri 28.90038159956593 9.2529e-05 deg M 42.19309936850155 2.7302e-05 deg tp 2459166.639203078564 (2020-Nov-13.13920308) 0.0001483 TDB period 1961.21849615751 5.37 1.7497e-05 4.79e-08 d yr n .1835593538941862 1.6376e-09 deg/d Q 3.317690936941583 1.9732e-08 au   Orbit Determination Parameters    # obs. used (total)      1399      data-arc span      14740 days (40.36 yr)      first obs. used      1981-02-09      last obs. used      2021-06-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54621      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 13:51:42   Additional Information  Earth MOID = 1.80122 au   Jupiter MOID = 1.911 au   T_jup = 3.225  [ 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-Aug-03 16:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin