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24201 Davidkeith (1999 XL40)
Classification: Main-belt Asteroid          SPK-ID: 2024201
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08465836652236784 2.9687e-08  
a 2.350865385892632 7.4322e-09 au
q 2.151844962408986 6.8082e-08 au
i 6.740776514988754 2.9191e-06 deg
node 248.156443245174 3.239e-05 deg
peri 17.93627102224853 3.9481e-05 deg
M 83.19215419532424 2.2267e-05 deg
tp 2458896.257459785737
(2020-Feb-16.75745979)
8.1547e-05 TDB
period 1316.558220381923
3.60
6.2434e-06
1.709e-08
d
yr
n .2734402432241598 1.2967e-09 deg/d
Q 2.549885809376278 8.0614e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1466  
   data-arc span      10281 days (28.15 yr)  
   first obs. used      1992-11-25  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:37:33  

Additional Information
 Earth MOID = 1.13548 au 
 Jupiter MOID = 2.50019 au 
 T_jup = 3.544 
[ 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 15.20   n/a E2021B10  
rotation period rot_per 12.774 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.]

24201 Davidkeith           Discovered 1999 Dec. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team in Socorro.
David Keith mentored a finalist in the 2008 Intel Science Talent Search (STS), a science competition for high school seniors. He teaches at the Byram Hills High School, Armonk, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080221/MPCPages.arcLast Updated: 2008-03-05

[ show close-approach data ]
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