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100229 Jeanbailly (1994 PB18)
Classification: Outer Main-belt Asteroid          SPK-ID: 2100229
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2393067963263188 5.5301e-08  
a 3.948524644419848 3.7986e-08 au
q 3.003615861548216 2.1705e-07 au
i 4.755565077393392 6.0772e-06 deg
node 163.9222104299367 5.8572e-05 deg
peri 197.2274859676403 5.9193e-05 deg
M 117.785771575744 9.5513e-06 deg
tp 2458262.849398046781
(2018-May-24.34939805)
7.0963e-05 TDB
period 2865.831858868364
7.85
4.1355e-05
1.132e-07
d
yr
n .1256179768139482 1.8127e-09 deg/d
Q 4.893433427291479 4.7076e-08 au
  Orbit Determination Parameters
   # obs. used (total)      707  
   data-arc span      9659 days (26.44 yr)  
   first obs. used      1994-08-10  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:32:50  

Additional Information
 Earth MOID = 1.99953 au 
 Jupiter MOID = .563484 au 
 T_jup = 3.004 
[ 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 13.9   n/a MPO264054  
diameter diameter 8.863 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 112.945 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.090   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

100229 Jeanbailly           Discovered 1994 Aug. 10 by E. W. Elst at the European Southern Observatory.
Jean-Sylvain Bailly (1736-1793), was a French astronomer, mathematician and freemason. In 1759 he calculated an orbit for the next appearance of Halley's comet and in 1771 he published his essay "Sur les inégalités de la lumičre des satellites de Jupiter".
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-08-10Last Updated: 2014-08-13

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Alternate Designations
 1994 PB18 = 2002 RX80 
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