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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .005024702319573737 5.7653e-08  
a 5.18441047559878 1.5017e-07 au
q 5.158360356256416 4.2002e-07 au
i 18.09483558496252 5.7619e-06 deg
node 174.676468369609 1.7694e-05 deg
peri 130.067661772539 0.00068637 deg
M 318.8801292038779 0.00068845 deg
tp 2459888.989229019780
(2022-Nov-05.48922902)
0.0082507 TDB
period 4311.68967738686
11.80
0.00018733
5.129e-07
d
yr
n .0834939494574622 3.6276e-09 deg/d
Q 5.210460594941143 1.5092e-07 au
  Orbit Determination Parameters
   # obs. used (total)      328  
   data-arc span      7176 days (19.65 yr)  
   first obs. used      2001-10-11  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 16:02:42  

Additional Information
 Earth MOID = 4.15797 au 
 Jupiter MOID = .208716 au 
 T_jup = 2.901 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457675.5 (2016-Oct-14.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .003345057913571121 5.5567e-08  
q 5.167586191458592 4.0832e-07 au
tp 2455691.229562209802
(2011-May-09.72956221)
0.012685 TDB
node 174.6771706652239 1.7695e-05 deg
peri 139.3469711115346 0.0010605 deg
i 18.09424379670323 5.7616e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      328  
   data-arc span      7176 days (19.65 yr)  
   first obs. used      2001-10-11  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 16:02:42  

Additional Information
 Jupiter MOID = .208716 au 
 T_jup = 2.901 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.087743049529178E-15 -2.185763828466745E-14 -1.288204874057036E-10 5.792597363719448E-15 -1.095421610385647E-11 -2.120935494509604E-15
q -2.185763828466745E-14 1.667273183295836E-13 1.292365914595531E-9 -4.30605809534621E-14 1.098583484655118E-10 2.540565442164364E-14
tp -1.288204874057036E-10 1.292365914595531E-9 .0001609131669263174 -2.192292922156708E-9 1.345109418718487E-5 9.702201672312196E-10
node 5.792597363719448E-15 -4.30605809534621E-14 -2.192292922156708E-9 3.131105518459935E-10 -4.808512389080799E-10 4.001982275062926E-11
peri -1.095421610385647E-11 1.098583484655118E-10 1.345109418718487E-5 -4.808512389080799E-10 1.124740462098828E-6 4.350933941138213E-11
i -2.120935494509604E-15 2.540565442164364E-14 9.702201672312196E-10 4.001982275062926E-11 4.350933941138213E-11 3.319640241115768E-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 13.15   n/a E2021B55  
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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