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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1756046393299671 5.002e-08  
a 2.381925835311937 1.9457e-08 au
q 1.963648608091254 1.2357e-07 au
i 1.224266739346831 7.5538e-06 deg
node 168.873794537473 0.00028912 deg
peri 103.3939011752403 0.0002902 deg
M 158.4204507059267 2.4428e-05 deg
tp 2458009.619683292194
(2017-Sep-13.11968329)
8.9616e-05 TDB
period 1342.736452692419
3.68
1.6452e-05
4.504e-08
d
yr
n .2681092028730863 3.285e-09 deg/d
Q 2.800203062532621 2.2873e-08 au
  Orbit Determination Parameters
   # obs. used (total)      171  
   data-arc span      5585 days (15.29 yr)  
   first obs. used      2003-09-18  
   last obs. used      2019-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55758  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:04:42  

Additional Information
 Earth MOID = .947353 au 
 Jupiter MOID = 2.30218 au 
 T_jup = 3.516 
[ 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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