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18209 (4158 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2018209
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05621143076610078 4.4192e-08  
a 2.360233112337368 7.4983e-09 au
q 2.227561032151357 1.0439e-07 au
i 4.250608291197923 4.899e-06 deg
node 333.8683004785751 4.2699e-05 deg
peri 163.9505070785187 5.2092e-05 deg
M 88.82509577316526 2.9042e-05 deg
tp 2458873.713611395816
(2020-Jan-25.21361140)
0.0001069 TDB
period 1324.435384769345
3.63
6.3115e-06
1.728e-08
d
yr
n .2718139398417652 1.2953e-09 deg/d
Q 2.492905192523378 7.9198e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1228  
   data-arc span      21779 days (59.63 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-05-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50866  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:10  

Additional Information
 Earth MOID = 1.24086 au 
 Jupiter MOID = 2.50512 au 
 T_jup = 3.546 
[ 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 15.19   n/a E2021B10  

18209 (4158 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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