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18826 Leifer (1999 NG24)
Classification: Main-belt Asteroid          SPK-ID: 2018826
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1756414518911133 3.3628e-08  
a 2.417468037981067 7.7813e-09 au
q 1.992860441889712 7.9606e-08 au
i 2.88839019679612 3.5006e-06 deg
node 76.67164097581841 6.9263e-05 deg
peri 3.096212446498634 6.9972e-05 deg
M 120.3831226466593 9.8045e-06 deg
tp 2458741.404916584938
(2019-Sep-14.90491658)
3.705e-05 TDB
period 1372.902001508338
3.76
6.6286e-06
1.815e-08
d
yr
n .2622182789481595 1.266e-09 deg/d
Q 2.842075634072423 9.148e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1602  
   data-arc span      14360 days (39.32 yr)  
   first obs. used      1981-11-24  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49634  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:07  

Additional Information
 Earth MOID = 1.00813 au 
 Jupiter MOID = 2.3977 au 
 T_jup = 3.493 
[ 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 14.6   n/a MPO358812  

18826 Leifer           Discovered 1999 July 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Andrew Michael Leifer (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for his mathematics team project. He was also awarded first place in the American Mathematical Society's Karl Menger Memorial Prize. He attends the Fairview High School, Boulder, Colorado, 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: 20040830/MPCPages.arcLast Updated: 2004-09-06

Alternate Designations
 1999 NG24 = 1981 WP6 = 1998 HP62 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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