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243453 (2009 HX85)
Classification: Jupiter Trojan          SPK-ID: 2243453
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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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.arcLast Updated: 2010-06-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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