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295370 (2008 HK54)
Classification: Main-belt Asteroid          SPK-ID: 2295370
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 .04222809123820107 5.1666e-08  
a 3.124080375465798 4.1598e-08 au
q 2.992156424335155 1.5827e-07 au
i 19.02287839980911 8.5237e-06 deg
node 61.16724839876405 1.5627e-05 deg
peri 101.1090901778654 0.00010121 deg
M 133.4699408014533 9.8739e-05 deg
tp 2458252.739203851623
(2018-May-14.23920385)
0.00055573 TDB
period 2016.887735148261
5.52
4.0283e-05
1.103e-07
d
yr
n .1784928301790364 3.565e-09 deg/d
Q 3.256004326596441 4.3355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      223  
   data-arc span      7124 days (19.50 yr)  
   first obs. used      2000-11-26  
   last obs. used      2020-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58279  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 05:17:54  

Additional Information
 Earth MOID = 2.04838 au 
 Jupiter MOID = 1.83276 au 
 T_jup = 3.129 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457510.5 (2016-May-02.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04027249182608382 5.0011e-08  
q 2.995120659601697 1.5039e-07 au
tp 2458235.010989620294
(2018-Apr-26.51098962)
0.00059611 TDB
node 61.23298881068812 1.5593e-05 deg
peri 97.82955166373306 0.00010863 deg
i 19.0572407852479 8.5347e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      223  
   data-arc span      7124 days (19.50 yr)  
   first obs. used      2000-11-26  
   last obs. used      2020-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58279  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 05:17:54  

Additional Information
 Jupiter MOID = 1.83276 au 
 T_jup = 3.129 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.501074707210461E-15 -7.285709670934599E-15 9.797124968405394E-12 9.679439031310695E-15 1.742378312682118E-12 1.553235979102705E-15
q -7.285709670934599E-15 2.261667860188908E-14 -3.318550937208124E-11 -2.928373055522426E-14 -5.999803215078748E-12 1.975474513103332E-15
tp 9.797124968405394E-12 -3.318550937208124E-11 3.553498188753003E-7 1.275899016577635E-10 6.40940104549163E-8 5.323984258194983E-11
node 9.679439031310695E-15 -2.928373055522426E-14 1.275899016577635E-10 2.431471863998686E-10 -2.062959571035366E-10 -2.972754861277905E-11
peri 1.742378312682118E-12 -5.999803215078748E-12 6.40940104549163E-8 -2.062959571035366E-10 1.180088860745575E-8 3.748207256041128E-11
i 1.553235979102705E-15 1.975474513103332E-15 5.323984258194983E-11 -2.972754861277905E-11 3.748207256041128E-11 7.284109643622593E-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 15.9   n/a MPO437320  
diameter diameter 4.577 km 1.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.034   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

295370 (2008 HK54)          Discovered 2008-Apr-29 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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