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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09922347283505158 4.1369e-08  
a 3.145621398345829 1.8152e-08 au
q 2.833501918977705 1.3292e-07 au
i 10.24153250615964 4.3657e-06 deg
node 164.0806300096523 2.3862e-05 deg
peri 9.079598412756278 3.2084e-05 deg
M 65.79208244084911 2.0809e-05 deg
tp 2458628.083225238396
(2019-May-24.58322524)
0.00011798 TDB
period 2037.783787049365
5.58
1.7639e-05
4.829e-08
d
yr
n .1766625106588303 1.5292e-09 deg/d
Q 3.457740877713954 1.9953e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1423  
   data-arc span      9672 days (26.48 yr)  
   first obs. used      1993-07-15  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:48:31  

Additional Information
 Earth MOID = 1.83965 au 
 Jupiter MOID = 1.50836 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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