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312517 (2009 DD21)
Classification: Main-belt Asteroid          SPK-ID: 2312517
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175694818944206 4.3421e-08  
a 2.381493888173564 1.8917e-08 au
q 1.963077750674176 1.1046e-07 au
i 1.224417038672216 5.8223e-06 deg
node 168.8635402199762 0.00022393 deg
peri 103.4897341062295 0.00022467 deg
M 265.5677983397698 2.0827e-05 deg
tp 2459352.619639281886
(2021-May-18.11963928)
7.9914e-05 TDB
period 1342.371224146357
3.68
1.5994e-05
4.379e-08
d
yr
n .2681821492627212 3.1954e-09 deg/d
Q 2.799910025672951 2.2241e-08 au
  Orbit Determination Parameters
   # obs. used (total)      200  
   data-arc span      5981 days (16.38 yr)  
   first obs. used      2003-09-18  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55214  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:46:45  

Additional Information
 Earth MOID = .94726 au 
 Jupiter MOID = 2.30347 au 
 T_jup = 3.517 
[ 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 17.5   n/a MPO460290  

312517 (2009 DD21)          Discovered 2009-Feb-19 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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