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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2594136578689955 3.5901e-08  
a 2.201454709014993 7.5734e-09 au
q 1.630367290316488 7.7003e-08 au
i 7.67446494664401 5.3023e-06 deg
node 65.5018372313226 3.2211e-05 deg
peri 253.8142161133464 3.4497e-05 deg
M 350.7040618374737 1.2215e-05 deg
tp 2458631.307310430400
(2019-May-27.80731043)
4.0511e-05 TDB
period 1193.06212681712
3.27
6.1565e-06
1.686e-08
d
yr
n .3017445545442104 1.5571e-09 deg/d
Q 2.772542127713497 9.538e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1037  
   data-arc span      7504 days (20.54 yr)  
   first obs. used      1999-05-13  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50041  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:48:57  

Additional Information
 Earth MOID = .637562 au 
 Jupiter MOID = 2.57328 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 15.5   n/a MPO436304  

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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