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18789 Metzger (1999 JV56)
Classification: Main-belt Asteroid          SPK-ID: 2018789
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1915001428481544 3.0988e-08  
a 2.286715050319891 5.8809e-09 au
q 1.848808791530607 7.0844e-08 au
i 3.780721215083906 3.5455e-06 deg
node 124.6392404274843 5.3125e-05 deg
peri 177.0031472040834 5.4007e-05 deg
M 344.401518296297 8.8681e-06 deg
tp 2459055.226330535882
(2020-Jul-24.72633054)
3.1094e-05 TDB
period 1263.038247385353
3.46
4.8723e-06
1.334e-08
d
yr
n .2850269979909517 1.0995e-09 deg/d
Q 2.724621309109175 7.007e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1630  
   data-arc span      18116 days (49.60 yr)  
   first obs. used      1971-03-25  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:12:51  

Additional Information
 Earth MOID = .833358 au 
 Jupiter MOID = 2.50049 au 
 T_jup = 3.574 
[ 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 15.1   n/a MPO384915  
diameter diameter 2.476 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.346   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18789 Metzger           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Vincent Tyler Metzger (b. 1986) was awarded third place in the 2003 Intel International Science and Engineering Fair for his environmental science project. He attends the Cibola High School, Albuquerque, New Mexico, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040830/MPCPages.arcLast Updated: 2004-09-06

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Alternate Designations
 1999 JV56 = 2314 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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