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11552 Boucolion (1993 BD4)
Classification: Jupiter Trojan          SPK-ID: 2011552
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1527118711142972 2.528e-08  
a 5.271099110864177 8.2814e-08 au
q 4.4661397028152 1.8443e-07 au
i 14.6788612724289 1.9531e-06 deg
node 138.3620598216786 3.5851e-06 deg
peri 182.1961190961676 1.082e-05 deg
M 302.0427683044113 1.3769e-05 deg
tp 2459912.131777136764
(2022-Nov-28.63177714)
0.00017687 TDB
period 4420.284272975972
12.10
0.00010417
2.852e-07
d
yr
n .08144272579953975 1.9193e-09 deg/d
Q 6.076058518913154 9.5461e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2296  
   data-arc span      10274 days (28.13 yr)  
   first obs. used      1993-01-27  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4534  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:50:18  

Additional Information
 Earth MOID = 3.45142 au 
 Jupiter MOID = .564666 au 
 T_jup = 2.912 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.20   n/a E2021B10  
diameter diameter 51.136 km 0.521 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 32.44 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:
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bull. 42, 216-224.]
geometric albedo albedo 0.062   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

11552 Boucolion           Discovered 1993 Jan. 27 by E. W. Elst at Caussols.
Boucolion was the father of Pedasos and Aesopos. Both sons died near the Scamander river.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1993 BD4 = 1975 NP1 = 1994 CE20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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