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

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04781195554512623 1.4953e-08  
a 2.989024841387383 1.4161e-08 au
q 2.846113718547691 4.6982e-08 au
i 11.01793174629126 1.0555e-06 deg
node 140.3622778060311 5.4796e-06 deg
peri 43.99195204452696 2.6462e-05 deg
M 237.2944060475018 3.0393e-05 deg
tp 2460039.860768756987
(2023-Apr-05.36076876)
0.00016167 TDB
period 1887.52500429749
5.17
1.3413e-05
3.672e-08
d
yr
n .1907259502154181 1.3554e-09 deg/d
Q 3.131935964227075 1.4838e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2250  
   data-arc span      10588 days (28.99 yr)  
   first obs. used      1992-03-11  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46563  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:11:07  

Additional Information
 Earth MOID = 1.86251 au 
 Jupiter MOID = 1.86608 au 
 T_jup = 3.227 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.16   n/a MPCxxxxx  
diameter diameter 8.939 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.462 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.153   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19504 Vladalekseev           Discovered 1998 June 1 by E. W. Elst at the European Southern Observatory.
Vladimir Alekseev (b. 1935), a physicist at the Troitsk Institute in the Moscow region, 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: 2016-11-01

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