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216438 (2009 DT121)
Classification: Main-belt Asteroid          SPK-ID: 2216438
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09972742445327927 3.6443e-08  
a 2.444398845967967 1.758e-08 au
q 2.200625244723014 9.1878e-08 au
i 1.906505082149877 4.9828e-06 deg
node 50.59120840577481 0.00015503 deg
peri 213.6594213458317 0.00015861 deg
M 311.0577351827035 3.7094e-05 deg
tp 2459390.274603930056
(2021-Jun-24.77460393)
0.00014497 TDB
period 1395.90715039153
3.82
1.5059e-05
4.123e-08
d
yr
n .2578968091817752 2.7822e-09 deg/d
Q 2.688172447212921 1.9334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      322  
   data-arc span      9458 days (25.89 yr)  
   first obs. used      1994-05-02  
   last obs. used      2020-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57637  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:49  

Additional Information
 Earth MOID = 1.18346 au 
 Jupiter MOID = 2.36198 au 
 T_jup = 3.492 
[ 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 16.94   n/a E2021B55  
diameter diameter 1.777 km 0.616 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.107   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

216438 (2009 DT121)          Discovered 2009-Feb-27 by Spacewatch at Kitt Peak
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

[ show close-approach data ]
Alternate Designations
 2009 DT121 = 1999 UH60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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