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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456912.5 (2014-Sep-12.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08766531274807661 4.6365e-08  
q 2.374994618934761 1.2427e-07 au
tp 2456526.173565015759
(2013-Aug-21.67356502)
0.0001095 TDB
node 193.3877487523214 1.6118e-05 deg
peri 16.40652608605115 2.8987e-05 deg
i 13.0318677752161 5.0229e-06 deg
  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
 Jupiter MOID = 2.12817 au 
 T_jup = 3.372 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.149752448423062E-15 -5.738288579988949E-15 -1.457247791087647E-12 -1.535010981149419E-14 -2.930568305574931E-13 8.4999821622129E-16
q -5.738288579988949E-15 1.544225869559655E-14 4.19339127929827E-12 3.967740181722556E-14 8.545663564197432E-13 -1.735479003797857E-15
tp -1.457247791087647E-12 4.19339127929827E-12 1.198921398035849E-8 2.037447649549753E-11 2.647887858356165E-9 4.414611853087087E-13
node -1.535010981149419E-14 3.967740181722556E-14 2.037447649549753E-11 2.597791176739393E-10 -2.484724789344587E-10 9.268435734952804E-12
peri -2.930568305574931E-13 8.545663564197432E-13 2.647887858356165E-9 -2.484724789344587E-10 8.402575422456706E-10 -8.888705679107459E-12
i 8.4999821622129E-16 -1.735479003797857E-15 4.414611853087087E-13 9.268435734952804E-12 -8.888705679107459E-12 2.522999841222925E-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 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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