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18559 (1997 EN2)
Classification: Main-belt Asteroid          SPK-ID: 2018559
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09914568492059421 4.1684e-08  
a 3.144331189363016 1.9257e-08 au
q 2.832584319976434 1.3461e-07 au
i 10.24225534605707 4.3998e-06 deg
node 164.0935067360161 2.4121e-05 deg
peri 8.761012768303932 3.2432e-05 deg
M 355.3713051447904 2.1129e-05 deg
tp 2458626.684657796136
(2019-May-23.18465780)
0.00011951 TDB
period 2036.530188633931
5.58
1.8709e-05
5.122e-08
d
yr
n .1767712563305932 1.6239e-09 deg/d
Q 3.456078058749599 2.1166e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1386  
   data-arc span      9430 days (25.82 yr)  
   first obs. used      1993-07-15  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51913  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:37:02  

Additional Information
 Earth MOID = 1.83924 au 
 Jupiter MOID = 1.51161 au 
 T_jup = 3.177 
[ 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 13.3   n/a MPO263513  
diameter diameter 12.068 km 0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18559 (1997 EN2)          Discovered 1997-Mar-04 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 EN2 = 1999 RN152 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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