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JPL Small-Body Database Browser
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18605 Jacqueslaskar (1998 BL26)
Classification: Main-belt Asteroid          SPK-ID: 2018605
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03271714619916169 4.7217e-08  
a 2.740924173354507 1.487e-08 au
q 2.651248956454051 1.2867e-07 au
i 3.030238066323816 4.9413e-06 deg
node 142.8809430993678 9.5804e-05 deg
peri 89.04335584866566 0.00012722 deg
M 192.0587370499923 8.6161e-05 deg
tp 2459373.712511128981
(2021-Jun-08.21251113)
0.0003983 TDB
period 1657.463443568918
4.54
1.3488e-05
3.693e-08
d
yr
n .2171993605028376 1.7675e-09 deg/d
Q 2.830599390254963 1.5357e-08 au
  Orbit Determination Parameters
   # obs. used (total)      995  
   data-arc span      10247 days (28.05 yr)  
   first obs. used      1991-10-07  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55725  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:14:35  

Additional Information
 Earth MOID = 1.64204 au 
 Jupiter MOID = 2.1423 au 
 T_jup = 3.347 
[ 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 14.9   n/a MPO350950  
diameter diameter 3.469 km 1.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.122   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18605 Jacqueslaskar           Discovered 1998 Jan. 28 by the OCA-DLR Asteroid Survey at Caussols.
Jacques Laskar (b. 1955) is principally concerned with the chaotic behavior of the principal planets. A staff member of the Institut de Mécanique Céleste in Paris, he was the first to show the chaotic motion of the inner solar system and the stabilization of the obliquity of the ecliptic by the moon.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1998 BL26 = 1991 VV11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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