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21128 Chapuis (1993 BJ5)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021128
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1040885400365133 5.4257e-08  
a 3.993713200804997 4.8217e-08 au
q 3.578013424408654 2.3151e-07 au
i 7.882399161745273 6.2477e-06 deg
node 317.0703646190974 4.1086e-05 deg
peri 270.7316756990058 5.2101e-05 deg
M 26.82766890986805 3.3641e-05 deg
tp 2458383.257808748254
(2018-Sep-21.75780875)
0.00027172 TDB
period 2915.169003813875
7.98
5.2793e-05
1.445e-07
d
yr
n .1234919826360039 2.2364e-09 deg/d
Q 4.409412977201339 5.3235e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1435  
   data-arc span      15567 days (42.62 yr)  
   first obs. used      1977-02-12  
   last obs. used      2019-09-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50988  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:26:25  

Additional Information
 Earth MOID = 2.58145 au 
 Jupiter MOID = .89019 au 
 T_jup = 3.029 
[ 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 12.1   n/a MPO449107  
diameter diameter 18.388 km 0.235 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.074   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

21128 Chapuis           Discovered 1993 Jan. 27 by E. W. Elst at Caussols.
Grégoire Chapuis (1761-1794) was a surgeon dedicated to educating the poor by establishing evening classes. As mayor of the city of Verviers, he promoted civil weddings. He was therefore accused of blasphemy by the prince-archbishop of Liège and put to death by beheading.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041126/MPCPages.arcLast Updated: 2004-12-06

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Alternate Designations
 1993 BJ5 = 1977 CO = 1999 XH193 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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