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18612 (1998 CK3)
Classification: Main-belt Asteroid          SPK-ID: 2018612
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1404858552858818 3.6619e-08  
a 2.460676464867595 8.8949e-09 au
q 2.114986227118831 9.2452e-08 au
i 2.343507084142536 3.8989e-06 deg
node .7815398836577868 9.2351e-05 deg
peri 241.837488529738 9.3349e-05 deg
M 256.7255721139563 1.5899e-05 deg
tp 2459604.955268590838
(2022-Jan-25.45526859)
6.3347e-05 TDB
period 1409.873670308448
3.86
7.6446e-06
2.093e-08
d
yr
n .2553420264393195 1.3845e-09 deg/d
Q 2.806366702616359 1.0144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1860  
   data-arc span      11371 days (31.13 yr)  
   first obs. used      1990-01-25  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49272  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:18  

Additional Information
 Earth MOID = 1.10193 au 
 Jupiter MOID = 2.21005 au 
 T_jup = 3.475 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO358810  
diameter diameter 4.137 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.272   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18612 (1998 CK3)          Discovered 1998-Feb-06 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 CK3 = 1990 BW5 = 1999 RC54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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