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18198 (2056 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2018198
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1208951827048357 7.6571e-08  
a 2.925211697693073 2.0283e-08 au
q 2.571567695050146 2.2398e-07 au
i 12.34393094199155 7.5388e-06 deg
node 205.3154095234293 2.3894e-05 deg
peri 350.0101222633169 3.1172e-05 deg
M 139.8034229537777 2.1539e-05 deg
tp 2458290.841051959721
(2018-Jun-21.34105196)
0.00010815 TDB
period 1827.403191543939
5.00
1.9006e-05
5.204e-08
d
yr
n .1970008598353397 2.0489e-09 deg/d
Q 3.278855700335999 2.2735e-08 au
  Orbit Determination Parameters
   # obs. used (total)      980  
   data-arc span      21525 days (58.93 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-08-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52283  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:09  

Additional Information
 Earth MOID = 1.57069 au 
 Jupiter MOID = 1.68755 au 
 T_jup = 3.233 
[ 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 13.8   n/a MPO350947  
diameter diameter 9.669 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18198 (2056 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
 2056 P-L = 1998 FM99 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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