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295336 (2008 HY8)
Classification: Jupiter Trojan          SPK-ID: 2295336
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .004567663718222442 5.9074e-08  
a 5.184585354192324 1.5775e-07 au
q 5.160903911775952 4.2628e-07 au
i 18.09472287704549 6.5141e-06 deg
node 174.6762032494638 1.7959e-05 deg
peri 125.8470593760627 0.0008 deg
M 289.9717316021508 0.00080272 deg
tp 2459839.265109733050
(2022-Sep-16.76510973)
0.0096254 TDB
period 4311.907839679957
11.81
0.00019679
5.388e-07
d
yr
n .08348972505560794 3.8104e-09 deg/d
Q 5.208266796608695 1.5847e-07 au
  Orbit Determination Parameters
   # obs. used (total)      286  
   data-arc span      6773 days (18.54 yr)  
   first obs. used      2001-10-11  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:42:02  

Additional Information
 Earth MOID = 4.16194 au 
 Jupiter MOID = .210008 au 
 T_jup = 2.901 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457330.5 (2015-Nov-04.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .003350075233634067 5.6469e-08  
q 5.168733481555972 4.0004e-07 au
tp 2455778.032669094735
(2011-Aug-04.53266909)
0.01351 TDB
node 174.6777990122173 1.7958e-05 deg
peri 146.6001734636105 0.001129 deg
i 18.09406231621241 6.5138e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      286  
   data-arc span      6773 days (18.54 yr)  
   first obs. used      2001-10-11  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:42:02  

Additional Information
 Jupiter MOID = .210008 au 
 T_jup = 2.901 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.188742646549531E-15 -2.126733709398846E-14 -4.375798443012227E-11 2.569599384201537E-15 -3.829188082528479E-12 4.857457779896478E-16
q -2.126733709398846E-14 1.600345672186267E-13 1.174499657221046E-9 -1.798413503897261E-14 9.980507285079628E-11 4.420609684853659E-15
tp -4.375798443012227E-11 1.174499657221046E-9 .0001825256996253365 -1.173628586069886E-9 1.525163946244772E-5 -7.645562145977405E-11
node 2.569599384201537E-15 -1.798413503897261E-14 -1.173628586069886E-9 3.224976768864748E-10 -4.044087536153783E-10 3.09394692621321E-11
peri -3.829188082528479E-12 9.980507285079628E-11 1.525163946244772E-5 -4.044087536153783E-10 1.274746817435886E-6 -3.551400612764616E-11
i 4.857457779896478E-16 4.420609684853659E-15 -7.645562145977405E-11 3.09394692621321E-11 -3.551400612764616E-11 4.243003190495708E-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 13.0   n/a MPO437320  
diameter diameter 13.002 km 0.958 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.060   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

295336 (2008 HY8)          Discovered 2008-Apr-24 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

Alternate Designations
 2008 HY8 = 2007 EC70 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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