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305756 (2009 DW12)
Classification: Main-belt Asteroid          SPK-ID: 2305756
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2114556398114757 4.2001e-08  
a 2.297878131659711 1.4689e-08 au
q 1.811978841120808 9.6155e-08 au
i 4.257801594881665 5.7934e-06 deg
node 323.4711043365861 7.0501e-05 deg
peri 123.9491308532118 7.2309e-05 deg
M 141.601264894116 1.4071e-05 deg
tp 2458500.058235077875
(2019-Jan-16.55823508)
4.9598e-05 TDB
period 1272.298206563911
3.48
1.22e-05
3.34e-08
d
yr
n .2829525327810137 2.7132e-09 deg/d
Q 2.783777422198613 1.7795e-08 au
  Orbit Determination Parameters
   # obs. used (total)      195  
   data-arc span      6218 days (17.02 yr)  
   first obs. used      2002-01-14  
   last obs. used      2019-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58731  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:50:31  

Additional Information
 Earth MOID = .832462 au 
 Jupiter MOID = 2.43528 au 
 T_jup = 3.560 
[ 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 17.8   n/a MPO413264  

305756 (2009 DW12)          Discovered 2009-Feb-16 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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