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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1036823567710516 3.8615e-08  
a 3.972099187467894 3.6188e-08 au
q 3.560262582382844 1.4283e-07 au
i 7.920890354584944 6.2122e-06 deg
node 316.8965086696047 2.8398e-05 deg
peri 267.7016694768886 4.2191e-05 deg
M 104.2579278261544 3.1702e-05 deg
tp 2458363.095785860397
(2018-Sep-01.59578586)
0.00025425 TDB
period 2891.535669047037
7.92
3.9515e-05
1.082e-07
d
yr
n .1245013173635327 1.7014e-09 deg/d
Q 4.383935792552944 3.994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1900  
   data-arc span      16040 days (43.92 yr)  
   first obs. used      1977-02-12  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47356  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:40:08  

Additional Information
 Earth MOID = 2.56344 au 
 Jupiter MOID = .894444 au 
 T_jup = 3.031 
[ 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 12.13   n/a E2021B10  
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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