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108521 (2001 LL)
Classification: Main-belt Asteroid          SPK-ID: 2108521
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 .07902013801605196 5.6226e-08  
a 3.036984426891719 2.9842e-08 au
q 2.797001498326135 1.7216e-07 au
i 11.29628070501788 5.3278e-06 deg
node 121.5587709722845 2.8122e-05 deg
peri 247.4036705252156 4.1398e-05 deg
M 103.1072732773325 3.0589e-05 deg
tp 2458446.832443912737
(2018-Nov-24.33244391)
0.00016437 TDB
period 1933.13540214853
5.29
2.8493e-05
7.801e-08
d
yr
n .1862259620303305 2.7448e-09 deg/d
Q 3.276967355457304 3.22e-08 au
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      9541 days (26.12 yr)  
   first obs. used      1993-12-17  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56869  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:08:52  

Additional Information
 Earth MOID = 1.8179 au 
 Jupiter MOID = 2.16295 au 
 T_jup = 3.207 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456979.5 (2014-Nov-18.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07581877122204399 5.5786e-08  
q 2.807532212252392 1.6952e-07 au
tp 2456501.366773985457
(2013-Jul-27.86677399)
0.00017659 TDB
node 121.7031677596408 2.8014e-05 deg
peri 245.276282370946 4.2533e-05 deg
i 11.31495541361786 5.3353e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      9541 days (26.12 yr)  
   first obs. used      1993-12-17  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56869  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:08:52  

Additional Information
 Jupiter MOID = 2.16295 au 
 T_jup = 3.207 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.112123877951927E-15 -9.332101412867437E-15 -7.570043955058667E-13 1.163486599299225E-14 -2.075091367477939E-13 1.550203176817039E-15
q -9.332101412867437E-15 2.873790088938779E-14 1.33862925400937E-12 -3.301387353892913E-14 4.866640504417914E-13 -3.181138965864787E-15
tp -7.570043955058667E-13 1.33862925400937E-12 3.118473896470319E-8 -4.690826383149681E-11 5.691538566911459E-9 -1.69947823036224E-12
node 1.163486599299225E-14 -3.301387353892913E-14 -4.690826383149681E-11 7.847797613261637E-10 -7.776571074963966E-10 4.291319186939846E-11
peri -2.075091367477939E-13 4.866640504417914E-13 5.691538566911459E-9 -7.776571074963966E-10 1.809068660506301E-9 -4.23438335645881E-11
i 1.550203176817039E-15 -3.181138965864787E-15 -1.69947823036224E-12 4.291319186939846E-11 -4.23438335645881E-11 2.846579206792874E-11

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 14.6   n/a MPO453543  
diameter diameter 7.503 km 0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.80 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.038   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

108521 (2001 LL)          Discovered 2001-Jun-11 by Yeung, W. K. Y. at Desert Beaver
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 LL = 2005 EP243 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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