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249458 (2009 HC65)
Classification: Main-belt Asteroid          SPK-ID: 2249458
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .231181000473504 6.4539e-08  
a 3.085570748424454 3.2478e-08 au
q 2.37224541577191 2.1635e-07 au
i 11.87889531867278 6.5886e-06 deg
node 149.2848337259803 3.3462e-05 deg
peri 166.0281297306845 3.6519e-05 deg
M 307.951884579957 1.6584e-05 deg
tp 2459286.722781717966
(2021-Mar-13.22278172)
9.3383e-05 TDB
period 1979.710515681586
5.42
3.1257e-05
8.558e-08
d
yr
n .1818447682872751 2.8711e-09 deg/d
Q 3.798896081076997 3.9987e-08 au
  Orbit Determination Parameters
   # obs. used (total)      232  
   data-arc span      8477 days (23.21 yr)  
   first obs. used      1997-02-10  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:43:56  

Additional Information
 Earth MOID = 1.36083 au 
 Jupiter MOID = 1.56031 au 
 T_jup = 3.153 
[ show covariance matrix ]

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 15.7   n/a MPO291719  
diameter diameter 4.803 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249458 (2009 HC65)          Discovered 2009-Apr-23 by Spacewatch at Kitt Peak
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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