+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08325527035698678 3.5574e-08   a 3.070418410727465 1.8532e-08 au q 2.81478989583328 1.1569e-07 au i 2.892855165525332 3.6092e-06 deg node 288.2375312367539 8.9872e-05 deg peri 29.673321723126 9.3702e-05 deg M 328.883555811723 2.7622e-05 deg tp 2459170.356523408339 (2020-Nov-16.85652341) 0.00015112 TDB period 1965.145762061063 5.38 1.7792e-05 4.871e-08 d yr n .1831925178020529 1.6586e-09 deg/d Q 3.32604692562165 2.0075e-08 au   Orbit Determination Parameters    # obs. used (total)      1347      data-arc span      14024 days (38.40 yr)      first obs. used      1981-02-09      last obs. used      2019-07-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55076      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 20:03:17   Additional Information  Earth MOID = 1.80184 au   Jupiter MOID = 1.90965 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 13.8   n/a MPO395111   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 ] 2020-Oct-23 21:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin