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JPL Small-Body Database Browser
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305946 (2009 HJ17)
Classification: Main-belt Asteroid          SPK-ID: 2305946
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09003819098232417 8.2328e-08  
a 3.005381127366831 5.0593e-08 au
q 2.734782047446303 2.4741e-07 au
i 9.06298000779392 1.2706e-05 deg
node 204.4864404421928 5.3908e-05 deg
peri 102.4844306698121 8.7951e-05 deg
M 241.1487143035778 7.3484e-05 deg
tp 2459228.774079553052
(2021-Jan-14.27407955)		 0.00039686 TDB
period 1903.039309282857
5.21		 4.8054e-05
1.316e-07		 d
yr
n .1891710792540921 4.7768e-09 deg/d
Q 3.275980207287359 5.5148e-08 au
   Orbit Determination Parameters
   # obs. used (total)      95  
   data-arc span      8559 days (23.43 yr)  
   first obs. used      1995-10-28  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65165  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:11:30  

Additional Information
 Earth MOID = 1.73828 au 
 Jupiter MOID = 1.95995 au 
 T_jup = 3.226 
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[ 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 16.8   n/a MPO264763  

305946 (2009 HJ17)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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Alternate Designations
 2009 HJ17 = 2006 WY37 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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