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305838 (2009 DM138)
Classification: Main-belt Asteroid          SPK-ID: 2305838
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1488487402609612 4.9256e-08  
a 3.083019601581045 3.7073e-08 au
q 2.624116017685856 1.6104e-07 au
i .7507789496891252 6.955e-06 deg
node 185.2451569307796 0.00045573 deg
peri 100.3463654355477 0.00045651 deg
M 293.5029874428254 2.746e-05 deg
tp 2459365.726675120482
(2021-May-31.22667512)
0.00015405 TDB
period 1977.255789202932
5.41
3.5664e-05
9.764e-08
d
yr
n .1820705252025701 3.284e-09 deg/d
Q 3.541923185476234 4.2591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      205  
   data-arc span      7159 days (19.60 yr)  
   first obs. used      2000-09-21  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56843  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:01:29  

Additional Information
 Earth MOID = 1.60782 au 
 Jupiter MOID = 1.61472 au 
 T_jup = 3.210 
[ 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 16.4   n/a MPO433970  

305838 (2009 DM138)          Discovered 2009-Feb-20 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 DM138 = 2004 JC51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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