+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243481 (2009 TW14) Classification: Main-belt Asteroid          SPK-ID: 2243481 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1833833557226578 5.5892e-08   a 3.011333107012285 2.3308e-08 au q 2.459104736649635 1.7617e-07 au i .9773033956107802 6.377e-06 deg node 171.8464639455661 0.00022106 deg peri 193.5109553444811 0.00022155 deg M 29.56879343424124 1.2469e-05 deg tp 2458843.728278351514 (2019-Dec-26.22827835) 6.5888e-05 TDB period 1908.6953926263 5.23 2.216e-05 6.067e-08 d yr n .1886105040074793 2.1898e-09 deg/d Q 3.563561477374935 2.7582e-08 au   Orbit Determination Parameters    # obs. used (total)      300      data-arc span      7732 days (21.17 yr)      first obs. used      1998-08-27      last obs. used      2019-10-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59493      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 02:15:22   Additional Information  Earth MOID = 1.45739 au   Jupiter MOID = 1.89768 au   T_jup = 3.223  [ 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 16.5   n/a MPO494333   diameter diameter 2.794 km 0.374 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   243481 (2009 TW14)          Discovered 2009-Oct-14 by La Sagra at La Sagra Reference: 20100626/Numbers.arc Last Updated: 2010-06-28 [ show close-approach data ] Alternate Designations  2009 TW14 = 1998 QL60 = 2004 YP8 = 2007 HU9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-22 07:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin