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21563 Chetgervais (1998 QW95)
Classification: Main-belt Asteroid          SPK-ID: 2021563
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1537961045217518 3.4766e-08  
a 2.786173134674434 1.5213e-08 au
q 2.357670560038348 1.0027e-07 au
i 7.779495962190801 5.5364e-06 deg
node 222.2258252442827 3.4559e-05 deg
peri 43.40243537209797 4.0673e-05 deg
M 303.9377788058258 2.2685e-05 deg
tp 2459265.032098471340
(2021-Feb-19.53209847)
0.00010785 TDB
period 1698.676103464456
4.65
1.3912e-05
3.809e-08
d
yr
n .211929748858996 1.7357e-09 deg/d
Q 3.214675709310519 1.7552e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1131  
   data-arc span      9335 days (25.56 yr)  
   first obs. used      1994-11-29  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51458  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:56:16  

Additional Information
 Earth MOID = 1.34937 au 
 Jupiter MOID = 1.87113 au 
 T_jup = 3.300 
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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 14.4   n/a MPO337440  
diameter diameter 7.629 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.076   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21563 Chetgervais           Discovered 1998 Aug. 19 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Chetley L. C. Gervais (b. 1988) was awarded first place in the 2005 Intel International Science and Engineering Fair for his medicine and health project. He attends the Sandwich Secondary School, LaSalle, Ontario, Canada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

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Alternate Designations
 1998 QW95 = 1994 WN9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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