+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14917 Taco (1994 AD11) Classification: Main-belt Asteroid          SPK-ID: 2014917 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2076995981126128 2.5812e-08   a 2.840544037401175 1.5013e-08 au q 2.250564182411772 7.6345e-08 au i 12.37539046729425 3.8295e-07 deg node 324.2008561290692 4.5596e-06 deg peri 57.85635758488691 7.4007e-06 deg M 346.5877583905877 9.0206e-06 deg tp 2459461.647774469778 (2021-Sep-04.14777447) 4.4084e-05 TDB period 1748.64124074991 4.79 1.3863e-05 3.795e-08 d yr n .2058741333617483 1.6321e-09 deg/d Q 3.430523892390578 1.8131e-08 au   Orbit Determination Parameters    # obs. used (total)      1802      data-arc span      12365 days (33.85 yr)      first obs. used      1987-08-30      last obs. used      2021-07-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47959      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 10:01:52   Additional Information  Earth MOID = 1.27857 au   Jupiter MOID = 2.18452 au   T_jup = 3.244  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.7   n/a MPO473968   diameter diameter 9.408 km 0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 9.7078 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Odden, C.E.; Jusuf, J.M.; Keefe, O.R.; Wang, A.; Zaeder, E.A. (2017) Minor Planet Bull. 44, 181-182.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.200   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14917 Taco           Discovered 1994 Jan. 8 by Spacewatch at Kitt Peak. Kenneth Dale "Taco" Cockrell (b. 1950), an engineer and pilot with NASA from 1987 to 1990, was then selected as an astronaut and flew on space shuttle missions STS-56, STS-69, STS-80, STS-98 and STS-111. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030614/MPCPages.arc Last Updated: 2005-04-26 Alternate Designations  1994 AD11 = 1987 QN1 = 1999 AL34  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-03 06:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin