+ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08325526988295004 3.5542e-08   a 3.07041840982488 1.832e-08 au q 2.814789896461332 1.1567e-07 au i 2.892855153348105 3.6087e-06 deg node 288.2375379686446 8.8664e-05 deg peri 29.67331330151499 9.2422e-05 deg M 328.8835577919843 2.7016e-05 deg tp 2459170.356512523714 (2020-Nov-16.85651252) 0.00014777 TDB period 1965.145761194548 5.38 1.7588e-05 4.815e-08 d yr n .1831925178828301 1.6395e-09 deg/d Q 3.326046923188429 1.9845e-08 au   Orbit Determination Parameters    # obs. used (total)      1382      data-arc span      14495 days (39.69 yr)      first obs. used      1981-02-09      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54593      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:59:27   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 ] 2021-Jan-15 17:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin