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295396 (2008 JW7)
Classification: Outer Main-belt Asteroid          SPK-ID: 2295396
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1581070694688264 5.4454e-08  
a 3.965458568937838 6.8887e-08 au
q 3.33849153550303 2.4299e-07 au
i 9.570782375071538 7.5558e-06 deg
node 150.5996018365109 3.7212e-05 deg
peri 272.1617555297258 4.5588e-05 deg
M 12.50992551127697 2.4294e-05 deg
tp 2459100.271605211423
(2020-Sep-07.77160521)
0.00019429 TDB
period 2884.287527640477
7.90
7.5157e-05
2.058e-07
d
yr
n .1248141860165037 3.2523e-09 deg/d
Q 4.592425602372646 7.9778e-08 au
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5480 days (15.00 yr)  
   first obs. used      2006-01-09  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 14:58:43  

Additional Information
 Earth MOID = 2.37046 au 
 Jupiter MOID = .985699 au 
 T_jup = 3.012 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457589.5 (2016-Jul-20.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1568985232643508 5.433e-08  
q 3.339480126306049 2.4212e-07 au
tp 2456224.057484587709
(2012-Oct-23.55748459)
0.0002019 TDB
node 150.6247291012743 3.7216e-05 deg
peri 272.4846367447184 4.5753e-05 deg
i 9.571900214831226 7.5577e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5480 days (15.00 yr)  
   first obs. used      2006-01-09  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 14:58:43  

Additional Information
 Jupiter MOID = .985699 au 
 T_jup = 3.012 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.951745264427376E-15 -1.281876481101615E-14 -1.71447765576663E-12 -2.632099466812703E-15 -2.772179035930929E-13 -8.221644717293651E-15
q -1.281876481101615E-14 5.86232687413764E-14 3.629644111013671E-12 2.777022000337097E-14 9.159042971802086E-13 4.141309752504223E-14
tp -1.71447765576663E-12 3.629644111013671E-12 4.076243199203112E-8 -6.387695312822893E-11 5.377380528170062E-9 5.51498147063764E-12
node -2.632099466812703E-15 2.777022000337097E-14 -6.387695312822893E-11 1.385053997898496E-9 -1.37208833572994E-9 9.561502442231601E-11
peri -2.772179035930929E-13 9.159042971802086E-13 5.377380528170062E-9 -1.37208833572994E-9 2.093372467929366E-9 -9.282536431306919E-11
i -8.221644717293651E-15 4.141309752504223E-14 5.51498147063764E-12 9.561502442231601E-11 -9.282536431306919E-11 5.711914321526868E-11

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 14.6   n/a MPO455183  
diameter diameter 7.546 km 0.814 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.045   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

295396 (2008 JW7)          Discovered 2008-May-05 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

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