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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04490475404712473 6.4543e-08  
a 2.99173641390863 3.3406e-08 AU
q 2.857393226068237 1.9115e-07 AU
i 11.0072309200442 6.6361e-06 deg
node 140.521252959586 3.1982e-05 deg
peri 45.61269700589351 8.5375e-05 deg
M 100.8831731143413 7.5764e-05 deg
tp 2456270.836981589176
(2012-Dec-09.33698159)
0.00039924 JED
period 1890.094063672848
5.17
3.1657e-05
8.667e-08
d
yr
n .1904667111119564 3.1901e-09 deg/d
Q 3.126079601749025 3.4906e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1015  
   data-arc span      7763 days (21.25 yr)  
   first obs. used      1992-03-11  
   last obs. used      2013-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5208  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 19:18:46  

Additional Information
 Earth MOID = 1.87361 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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