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213023 (1995 WK18)
Classification: Main-belt Asteroid          SPK-ID: 2213023
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07856105008541198 5.637e-08  
a 3.111553360427399 2.9805e-08 au
q 2.86710646103543 1.8555e-07 au
i 4.38226680982315 5.4198e-06 deg
node 245.6311483176048 6.0939e-05 deg
peri 343.0188517442139 6.8394e-05 deg
M 19.82992524531589 2.8573e-05 deg
tp 2459090.071065232209
(2020-Aug-28.57106523)
0.0001596 TDB
period 2004.768854375545
5.49
2.8805e-05
7.886e-08
d
yr
n .1795718240605521 2.5801e-09 deg/d
Q 3.356000259819368 3.2146e-08 au
  Orbit Determination Parameters
   # obs. used (total)      428  
   data-arc span      10767 days (29.48 yr)  
   first obs. used      1990-12-19  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51048  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:41:02  

Additional Information
 Earth MOID = 1.85589 au 
 Jupiter MOID = 1.64002 au 
 T_jup = 3.210 
[ 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 15.34   n/a MPCxxxxx  
diameter diameter 3.866 km 1.381 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.090   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213023 (1995 WK18)          Discovered 1995-Nov-17 by Spacewatch at Kitt Peak
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1995 WK18 = 2001 XC135 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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