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305981 (2009 HC103)
Classification: Main-belt Asteroid          SPK-ID: 2305981
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05096958446029876 4.9007e-08  
a 3.124718246894428 3.6884e-08 au
q 2.965452656294706 1.6424e-07 au
i 11.63377541935702 4.5071e-06 deg
node 131.7450716654709 3.6838e-05 deg
peri 148.4796302675836 8.8096e-05 deg
M 315.1252775585796 7.8145e-05 deg
tp 2459251.986106237447
(2021-Feb-06.48610624)
0.0004364 TDB
period 2017.505475686579
5.52
3.5721e-05
9.78e-08
d
yr
n .1784381774118794 3.1594e-09 deg/d
Q 3.283983837494151 3.8763e-08 au
  Orbit Determination Parameters
   # obs. used (total)      212  
   data-arc span      6735 days (18.44 yr)  
   first obs. used      2002-01-13  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59731  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:09:50  

Additional Information
 Earth MOID = 1.95552 au 
 Jupiter MOID = 1.92449 au 
 T_jup = 3.181 
[ 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 15.6   n/a MPO433971  

305981 (2009 HC103)          Discovered 2009-Apr-17 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 HC103 = 2008 CY81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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