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305840 (2009 DT138)
Classification: Main-belt Asteroid          SPK-ID: 2305840
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02757960796034852 6.2287e-08  
a 2.902851085579603 4.3531e-08 au
q 2.822791590672046 1.911e-07 au
i 2.972575927989491 6.0287e-06 deg
node 109.7581422778786 0.00013984 deg
peri 229.9279135986182 0.00019001 deg
M 345.581854673128 0.00013326 deg
tp 2459272.850653936792
(2021-Feb-27.35065394)
0.00066935 TDB
period 1806.490004557045
4.95
4.0635e-05
1.113e-07
d
yr
n .199281479051567 4.4826e-09 deg/d
Q 2.982910580487161 4.4732e-08 au
  Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      5487 days (15.02 yr)  
   first obs. used      2004-04-16  
   last obs. used      2019-04-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .71003  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:56:41  

Additional Information
 Earth MOID = 1.81208 au 
 Jupiter MOID = 2.11592 au 
 T_jup = 3.284 
[ 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 MPO433970  

305840 (2009 DT138)          Discovered 2009-Feb-20 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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