+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243453 (2009 HX85) Classification: Jupiter Trojan          SPK-ID: 2243453 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .1179682258849033 6.1456e-08   a 5.141562820538391 2.1389e-07 au q 4.535021776323698 4.543e-07 au i 18.48863259604378 6.326e-06 deg node 193.7707758536737 1.7764e-05 deg peri 93.78444295795587 4.367e-05 deg M 279.5106836744363 4.91e-05 deg tp 2459952.587546018639 (2023-Jan-08.08754602) 0.0006299 TDB period 4258.347967329559 11.66 0.00026572 7.275e-07 d yr n .08453982689107453 5.2752e-09 deg/d Q 5.748103864753085 2.3912e-07 au   Orbit Determination Parameters    # obs. used (total)      275      data-arc span      6816 days (18.66 yr)      first obs. used      2001-08-27      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53812      source      ORB      producer      Otto Matic      solution date      2020-May-21 12:48:44   Additional Information  Earth MOID = 3.58524 au   Jupiter MOID = .110495 au   T_jup = 2.884  [ hide covariance matrix ] Orbital Elements at Epoch 2457234.5 (2015-Jul-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1155354273479469 6.1602e-08   q 4.560177602900811 4.5793e-07 au tp 2455682.755873686803 (2011-May-01.25587369) 0.00044168 TDB node 193.7849913093949 1.7757e-05 deg peri 93.56782278749658 4.4383e-05 deg i 18.47657335302525 6.3223e-06 deg   Orbit Determination Parameters    # obs. used (total)      275      data-arc span      6816 days (18.66 yr)      first obs. used      2001-08-27      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53812      source      ORB      producer      Otto Matic      solution date      2020-May-21 12:48:44   Additional Information  Jupiter MOID = .110495 au   T_jup = 2.884  Orbit Covariance (6×6)   e q tp node peri i e 3.794765143095489E-15 -2.659051737448563E-14 -1.085840255630792E-11 -1.054292342946594E-14 -1.193116890485424E-12 -2.770000117526145E-15 q -2.659051737448563E-14 2.096975740279287E-13 1.075051554810703E-10 9.429028034119204E-14 1.177944624382717E-11 3.351671752778616E-14 tp -1.085840255630792E-11 1.075051554810703E-10 1.950790675807437E-7 8.929292434737842E-11 1.78420853764971E-8 2.046572095658312E-11 node -1.054292342946594E-14 9.429028034119204E-14 8.929292434737842E-11 3.153095452592192E-10 -2.899135732925298E-10 1.535382226008944E-11 peri -1.193116890485424E-12 1.177944624382717E-11 1.78420853764971E-8 -2.899135732925298E-10 1.969809953558207E-9 -1.212456800998177E-11 i -2.770000117526145E-15 3.351671752778616E-14 2.046572095658312E-11 1.535382226008944E-11 -1.212456800998177E-11 3.997166994953314E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.9   n/a MPO437136   diameter diameter 15.137 km 0.526 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   geometric albedo albedo 0.037   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   243453 (2009 HX85)          Discovered 2009-Apr-29 by Spacewatch at Kitt Peak Reference: 20100626/Numbers.arc Last Updated: 2010-06-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-08 07:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin