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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05632329902266165 4.4259e-08  
a 2.360489218290786 7.7671e-09 au
q 2.227538678209225 1.0469e-07 au
i 4.250539069949937 4.9261e-06 deg
node 333.8677492371817 4.5155e-05 deg
peri 164.0162432346636 5.4565e-05 deg
M 34.39363809579792 3.0191e-05 deg
tp 2458873.945650786397
(2020-Jan-25.44565079)
0.00011107 TDB
period 1324.650959866427
3.63
6.538e-06
1.79e-08
d
yr
n .2717697045539461 1.3414e-09 deg/d
Q 2.493439758372347 8.2045e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1085  
   data-arc span      21682 days (59.36 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51874  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:28  

Additional Information
 Earth MOID = 1.24094 au 
 Jupiter MOID = 2.50544 au 
 T_jup = 3.546 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456948.5 (2014-Oct-18.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05602593044407395 4.4447e-08  
q 2.228645680295634 1.0512e-07 au
tp 2457551.639185647419
(2016-Jun-12.13918565)
0.00011111 TDB
node 333.916809471329 4.5112e-05 deg
peri 164.6625870824689 5.4513e-05 deg
i 4.252979622608786 4.9276e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1085  
   data-arc span      21682 days (59.36 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51874  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:28  

Additional Information
 Jupiter MOID = 2.50544 au 
 T_jup = 3.546 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.975523229210876E-15 -4.660758415906436E-15 8.040157614842207E-13 -1.300455519031001E-14 2.397389131791424E-13 -1.094706506278746E-15
q -4.660758415906436E-15 1.104947272947089E-14 -1.929646918586791E-12 3.051601112916326E-14 -5.809290069960409E-13 2.682211901097404E-15
tp 8.040157614842207E-13 -1.929646918586791E-12 1.234634728130697E-8 -1.108708223681263E-11 3.407007947882905E-9 -1.719722305363108E-12
node -1.300455519031001E-14 3.051601112916326E-14 -1.108708223681263E-11 2.035112397845534E-9 -2.032016879979027E-9 -3.166767848910398E-11
peri 2.397389131791424E-13 -5.809290069960409E-13 3.407007947882905E-9 -2.032016879979027E-9 2.971668713475155E-9 3.110182913029989E-11
i -1.094706506278746E-15 2.682211901097404E-15 -1.719722305363108E-12 -3.166767848910398E-11 3.110182913029989E-11 2.428147836413864E-11

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 15.2   n/a MPO458991  

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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