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19504 Vladalekseev (1998 LL2)
Classification: Main-belt Asteroid          SPK-ID: 2019504
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0450127982671128 5.5825e-08  
a 2.991637436562105 2.8717e-08 AU
q 2.856975464141792 1.5719e-07 AU
i 11.00780919805649 6.2123e-06 deg
node 140.5205914877974 2.5976e-05 deg
peri 45.64563370119961 7.2161e-05 deg
M 138.9328164169735 6.6441e-05 deg
tp 2456271.102610446565
(2012-Dec-09.60261045)
0.00034819 JED
period 1890.000267835619
5.17
2.7213e-05
7.451e-08
d
yr
n .1904761634834386 2.7426e-09 deg/d
Q 3.126299408982418 3.0009e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      8205 days (22.46 yr)  
   first obs. used      1992-03-11  
   last obs. used      2014-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48291  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:11:53  

Additional Information
 Earth MOID = 1.87383 AU 
 T_jup = 3.226 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0 mag n/a MPO263522  

19504 Vladalekseev           Discovered 1998 June 1 by E. W. Elst at the European Southern Observatory.
Vladmimir Alekseev (b. 1935), a physicist at the Troitsk Institute in Moscow, has searched the Tunguska site for pieces of the impacting body. He made radar measurements up to a depth of 80 meters.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060219/MPCPages.arcLast Updated: 2010-06-03

[ show close-approach data ]
Alternate Designations
 1998 LL2 = 1992 EN3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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