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74561 (1999 LE18)
Classification: Mars-crossing Asteroid          SPK-ID: 2074561
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2594223037588544 3.5659e-08  
a 2.201699165763188 7.4479e-09 au
q 1.630529295996954 7.6409e-08 au
i 7.673952053086392 5.2782e-06 deg
node 65.5015405781263 3.0007e-05 deg
peri 253.8582063413437 3.2397e-05 deg
M 111.3550472789333 1.2262e-05 deg
tp 2458631.401058657588
(2019-May-27.90105866)
4.0304e-05 TDB
period 1193.260854628603
3.27
6.0548e-06
1.658e-08
d
yr
n .3016943014627329 1.5308e-09 deg/d
Q 2.772869035529422 9.38e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1103  
   data-arc span      7564 days (20.71 yr)  
   first obs. used      1999-05-13  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:19:00  

Additional Information
 Earth MOID = .638533 au 
 Jupiter MOID = 2.57586 au 
 T_jup = 3.609 
[ 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 15.6   n/a MPO502608  

74561 (1999 LE18)          Discovered 1999-Jun-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 LE18 = 1999 JF111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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