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18633 (1998 EU)
Classification: Main-belt Asteroid          SPK-ID: 2018633
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .00879561254164523 3.217e-08  
a 3.15694503193335 1.9197e-08 au
q 3.129177766617192 1.0782e-07 au
i 9.131472706327063 4.8376e-06 deg
node 180.3525852716312 2.1726e-05 deg
peri 71.90343432935289 0.00028369 deg
M 298.1977218236366 0.00028405 deg
tp 2459552.223139278184
(2021-Dec-03.72313928)
0.0016171 TDB
period 2048.797129756506
5.61
1.8687e-05
5.116e-08
d
yr
n .1757128584238035 1.6027e-09 deg/d
Q 3.184712297249507 1.9365e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1225  
   data-arc span      24456 days (66.96 yr)  
   first obs. used      1954-04-08  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51823  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:45:50  

Additional Information
 Earth MOID = 2.13029 au 
 Jupiter MOID = 1.78324 au 
 T_jup = 3.186 
[ 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 14.24   n/a E2021B10  
diameter diameter 5.262 km 0.358 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.160   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18633 (1998 EU)          Discovered 1998-Mar-02 by ODAS at Caussols
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 EU = 1990 WT9 = 1999 LU14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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