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305751 (2009 DR7)
Classification: Main-belt Asteroid          SPK-ID: 2305751
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1365874244300462 5.8401e-08  
a 3.11326961616261 4.644e-08 au
q 2.68803613773464 1.9692e-07 au
i 10.93116577336241 8.109e-06 deg
node 351.3947449723278 3.2046e-05 deg
peri 268.8906619573083 4.4082e-05 deg
M 305.7877842376206 3.1744e-05 deg
tp 2459302.646928690203
(2021-Mar-29.14692869)
0.00017976 TDB
period 2006.427754313558
5.49
4.4894e-05
1.229e-07
d
yr
n .179423355376762 4.0146e-09 deg/d
Q 3.538503094590579 5.2783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      173  
   data-arc span      7170 days (19.63 yr)  
   first obs. used      2000-09-07  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59313  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:01:15  

Additional Information
 Earth MOID = 1.70202 au 
 Jupiter MOID = 1.70523 au 
 T_jup = 3.176 
[ 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 16.0   n/a MPO427633  
diameter diameter 4.440 km 0.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.030   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

305751 (2009 DR7)          Discovered 2009-Feb-19 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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