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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05066898441921847 6.2905e-08  
a 3.124795399703588 5.4625e-08 au
q 2.966465190282761 1.8501e-07 au
i 11.63336323425258 8.439e-06 deg
node 131.744149790583 4.0698e-05 deg
peri 148.3644543837585 0.00011683 deg
M 243.8327755632176 0.00011451 deg
tp 2459251.546365735936
(2021-Feb-06.04636574)
0.00064807 TDB
period 2017.580197867976
5.52
5.2905e-05
1.448e-07
d
yr
n .178431568856802 4.6788e-09 deg/d
Q 3.283125609124415 5.7393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      139  
   data-arc span      6253 days (17.12 yr)  
   first obs. used      2002-01-13  
   last obs. used      2019-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .69877  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:20:56  

Additional Information
 Earth MOID = 1.95591 au 
 Jupiter MOID = 1.92445 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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