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18218 (6245 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2018218
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08787965375410869 4.6398e-08  
a 2.602902528511211 1.2702e-08 au
q 2.374160355549952 1.2439e-07 au
i 13.02941473781532 5.0218e-06 deg
node 193.3659103853043 1.6127e-05 deg
peri 15.77089657492379 2.8853e-05 deg
M 221.4088114100036 2.7158e-05 deg
tp 2459590.997962499211
(2022-Jan-11.49796250)
0.00011776 TDB
period 1533.858455667074
4.20
1.1228e-05
3.074e-08
d
yr
n .2347022299677816 1.718e-09 deg/d
Q 2.83164470147247 1.3818e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1361  
   data-arc span      25017 days (68.49 yr)  
   first obs. used      1951-07-31  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5393  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:30  

Additional Information
 Earth MOID = 1.37275 au 
 Jupiter MOID = 2.12817 au 
 T_jup = 3.372 
[ 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 14.3   n/a MPO449084  
diameter diameter 3.984 km 0.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18218 (6245 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 ]
Alternate Designations
 6245 P-L = 1992 CJ5 = 3414 T-3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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