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18636 Villedepompey (1998 EF2)
Classification: Main-belt Asteroid          SPK-ID: 2018636
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04552468941697473 3.0903e-08  
a 2.912922192447085 1.268e-08 au
q 2.780312314340119 8.7396e-08 au
i 2.572579528370249 3.2264e-06 deg
node 166.625018413557 7.5104e-05 deg
peri 148.283329175556 8.4363e-05 deg
M 94.13457882530662 3.7752e-05 deg
tp 2458725.669687033562
(2019-Aug-30.16968703)
0.00019108 TDB
period 1815.899266784242
4.97
1.1856e-05
3.246e-08
d
yr
n .1982488822948425 1.2944e-09 deg/d
Q 3.045532070554052 1.3257e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2047  
   data-arc span      13813 days (37.82 yr)  
   first obs. used      1983-04-17  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54494  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:58  

Additional Information
 Earth MOID = 1.76489 au 
 Jupiter MOID = 2.08225 au 
 T_jup = 3.280 
[ 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 14.05   n/a MPCxxxxx  
diameter diameter 5.107 km 0.655 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.187   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18636 Villedepompey           Discovered 1998 Mar. 2 by the OCA-DLR Asteroid Survey at Caussols.
Once a small village, the Lorraine city of Pompey grew after the 1870 war, when a steel factory was moved there from the German-occupied northern part of Lorraine. A plaque on each foot of the Eiffel Tower indicates that the tower's steel was melted in the Pompey factory, which was closed in 1989.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040306/MPCPages.arcLast Updated: 2004-03-08

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Alternate Designations
 1998 EF2 = 1996 XZ13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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