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JPL Small-Body Database Browser
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305939 (2009 HM)
Classification: Main-belt Asteroid          SPK-ID: 2305939
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1722031697573003 5.8393e-08  
a 2.410087096104607 1.5652e-08 au
q 1.995062458764226 1.3929e-07 au
i 4.962720090934559 4.3168e-06 deg
node 212.9445424720697 7.6553e-05 deg
peri 279.1475751108343 8.056e-05 deg
M 36.34634218050616 1.8432e-05 deg
tp 2458862.523303327869
(2020-Jan-14.02330333)
7.0523e-05 TDB
period 1366.619247551347
3.74
1.3313e-05
3.645e-08
d
yr
n .2634237741382857 2.5662e-09 deg/d
Q 2.825111733444988 1.8348e-08 au
  Orbit Determination Parameters
   # obs. used (total)      246  
   data-arc span      8597 days (23.54 yr)  
   first obs. used      1996-10-08  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55572  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:01:44  

Additional Information
 Earth MOID = 1.01654 au 
 Jupiter MOID = 2.24589 au 
 T_jup = 3.495 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.2   n/a MPO455254  

305939 (2009 HM)          Discovered 2009-Apr-18 by Tozzi, F. at Sierra Stars
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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