+ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1833833668404501 5.5889e-08   a 3.011333105111414 2.3301e-08 au q 2.459104701617976 1.7617e-07 au i .9772978543999203 6.376e-06 deg node 171.8463376921223 0.00022093 deg peri 193.5111021448132 0.00022142 deg M 29.56877885205621 1.2467e-05 deg tp 2458843.728355813703 (2019-Dec-26.22835581) 6.5877e-05 TDB period 1908.695390819036 5.23 2.2153e-05 6.065e-08 d yr n .1886105041860667 2.1891e-09 deg/d Q 3.563561508604852 2.7574e-08 au   Orbit Determination Parameters    # obs. used (total)      326      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      .56029      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 00:56:15   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 ] 2021-Jan-23 01:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin