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187644 (2007 DA1)
Classification: Main-belt Asteroid          SPK-ID: 2187644
[ 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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1426764726861035 5.3352e-08  
a 3.153622864500447 4.441e-08 au
q 2.703675078011277 1.8357e-07 au
i 4.43432303350276 4.6142e-06 deg
node 285.8877338255672 0.00010402 deg
peri 23.52979039628949 0.0001073 deg
M 17.60661994457518 2.5754e-05 deg
tp 2459100.457036207809
(2020-Sep-07.95703621)		 0.0001461 TDB
period 2045.563945752444
5.60		 4.3209e-05
1.183e-07		 d
yr
n .1759905872155842 3.7175e-09 deg/d
Q 3.603570650989616 5.0746e-08 au
   Orbit Determination Parameters
   # obs. used (total)      355  
   data-arc span      9869 days (27.02 yr)  
   first obs. used      1993-10-13  
   last obs. used      2020-10-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46858  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:15  

Additional Information
 Earth MOID = 1.68778 au 
 Jupiter MOID = 1.65205 au 
 T_jup = 3.186 
[ 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 15.59   n/a E2021B55  

187644 (2007 DA1)          Discovered 2007-Feb-16 by Calvin College at Calvin-Rehoboth
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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