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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04073351461090332 5.1877e-08  
a 3.121834362470259 4.1045e-08 au
q 2.994671076853757 1.5853e-07 au
i 19.05892650466727 8.9242e-06 deg
node 61.23537354928141 1.5863e-05 deg
peri 99.61740769768458 0.00011387 deg
M 63.6511841330635 0.00011113 deg
tp 2458244.280902893937
(2018-May-05.78090289)
0.00062325 TDB
period 2014.713107144999
5.52
3.9733e-05
1.088e-07
d
yr
n .1786854906156576 3.5239e-09 deg/d
Q 3.248997648086762 4.2716e-08 au
  Orbit Determination Parameters
   # obs. used (total)      217  
   data-arc span      6819 days (18.67 yr)  
   first obs. used      2000-11-26  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58555  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:43:00  

Additional Information
 Earth MOID = 2.05221 au 
 Jupiter MOID = 1.84055 au 
 T_jup = 3.130 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457453.5 (2016-Mar-06.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04026865205883266 5.094e-08  
q 2.995215645795444 1.5513e-07 au
tp 2458234.738570286686
(2018-Apr-26.23857029)
0.00063597 TDB
node 61.23424818581796 1.5869e-05 deg
peri 97.77683768876616 0.00011617 deg
i 19.0567564376025 8.9239e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      217  
   data-arc span      6819 days (18.67 yr)  
   first obs. used      2000-11-26  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58555  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:43:00  

Additional Information
 Jupiter MOID = 1.84055 au 
 T_jup = 3.130 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.594860154514076E-15 -7.654058746736814E-15 1.177715607082725E-11 1.120717607254126E-14 2.110718921541965E-12 1.282729106066983E-15
q -7.654058746736814E-15 2.406495620017626E-14 -4.108305999240472E-11 -3.542686405435826E-14 -7.467976526210639E-12 3.308335715595614E-15
tp 1.177715607082725E-11 -4.108305999240472E-11 4.044526390979045E-7 1.554102357312596E-10 7.319174688088833E-8 5.604070296339227E-11
node 1.120717607254126E-14 -3.542686405435826E-14 1.554102357312596E-10 2.518184697191251E-10 -2.09296969090318E-10 -3.645451192655641E-11
peri 2.110718921541965E-12 -7.467976526210639E-12 7.319174688088833E-8 -2.09296969090318E-10 1.349442088896818E-8 4.430736150296061E-11
i 1.282729106066983E-15 3.308335715595614E-15 5.604070296339227E-11 -3.645451192655641E-11 4.430736150296061E-11 7.963539549490175E-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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