+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78836 (2003 QT39) Classification: Main-belt Asteroid          SPK-ID: 2078836 [ 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 .2238061548642721 4.1029e-08   a 2.427950714183706 1.0071e-08 au q 1.884560400642288 9.8614e-08 au i 1.02128955825176 4.5439e-06 deg node 243.3759246429766 0.00023315 deg peri 34.41591841191784 0.00023331 deg M 196.2096926091371 8.4332e-06 deg tp 2459629.200671146841 (2022-Feb-18.70067115) 3.3749e-05 TDB period 1381.841485117627 3.78 8.598e-06 2.354e-08 d yr n .2605219222878922 1.621e-09 deg/d Q 2.971341027725124 1.2325e-08 au   Orbit Determination Parameters    # obs. used (total)      548      data-arc span      15975 days (43.74 yr)      first obs. used      1976-05-03      last obs. used      2020-01-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55779      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 18:31:35   Additional Information  Earth MOID = .868234 au   Jupiter MOID = 2.16488 au   T_jup = 3.474  [ 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 16.2   n/a MPO449495   diameter diameter 1.369 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.312   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   78836 (2003 QT39)          Discovered 2003-Aug-22 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2003 QT39 = 1976 JW4 = 1999 NG23  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 16:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin