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18602 Lagillespie (1998 BX12)
Classification: Main-belt Asteroid          SPK-ID: 2018602
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1253180343113661 3.5453e-08  
a 2.424904995006168 8.173e-09 au
q 2.121020667640182 8.7639e-08 au
i 3.689665258263531 3.3197e-06 deg
node 102.3975489150634 6.0868e-05 deg
peri 104.9200023077351 6.2377e-05 deg
M 311.4907228799973 1.4048e-05 deg
tp 2459386.350109424986
(2021-Jun-20.85010942)
5.4078e-05 TDB
period 1379.242144290921
3.78
6.9729e-06
1.909e-08
d
yr
n .2610129058846868 1.3196e-09 deg/d
Q 2.728789322372155 9.1972e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1421  
   data-arc span      10430 days (28.56 yr)  
   first obs. used      1992-09-02  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50147  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:45:33  

Additional Information
 Earth MOID = 1.11892 au 
 Jupiter MOID = 2.23448 au 
 T_jup = 3.498 
[ 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 14.98   n/a MPCxxxxx  
diameter diameter 2.746 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.76 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:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.446   0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18602 Lagillespie           Discovered 1998 Jan. 23 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Lacy Ann Gillespie (b. 1985) was awarded second place in the 2003 Intel International Science and Engineering Fair for her zoology project. She attends the North Toole County High School, Sunburst, Montana, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 1998 BX12 = 1992 RB7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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