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JPL Small-Body Database Browser
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305954 (2009 HQ39)
Classification: Main-belt Asteroid          SPK-ID: 2305954
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 .1488161578991243 4.4584e-08  
a 2.530775559343122 2.6957e-08 au
q 2.154155264096671 1.1424e-07 au
i 2.85947248768972 4.8629e-06 deg
node 145.7319291157168 0.00016036 deg
peri 19.72162998600749 0.00016265 deg
M 222.9511341236823 3.174e-05 deg
tp 2459160.324395164100
(2020-Nov-06.82439516)
0.0001335 TDB
period 1470.546881000509
4.03
2.3496e-05
6.433e-08
d
yr
n .2448068841947211 3.9115e-09 deg/d
Q 2.907395854589573 3.0969e-08 au
  Orbit Determination Parameters
   # obs. used (total)      193  
   data-arc span      4864 days (13.32 yr)  
   first obs. used      2005-05-14  
   last obs. used      2018-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56939  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:19:36  

Additional Information
 Earth MOID = 1.16226 au 
 Jupiter MOID = 2.06642 au 
 T_jup = 3.434 
[ 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 16.6   n/a MPO455254  

305954 (2009 HQ39)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 HQ39 = 2006 QP86 = 2009 KD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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