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249218 (2008 EO86)
Classification: Main-belt Asteroid          SPK-ID: 2249218
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2640751207760484 7.032e-08  
a 2.57248344280165 2.0405e-08 au
q 1.89315456694942 1.9003e-07 au
i 13.38969848148458 9.1366e-06 deg
node 1.765484196778841 1.5278e-05 deg
peri 38.85448870071473 2.3086e-05 deg
M 112.5197342744172 1.837e-05 deg
tp 2458529.464644319156
(2019-Feb-14.96464432)
7.2549e-05 TDB
period 1507.048778052957
4.13
1.7931e-05
4.909e-08
d
yr
n .238877470485796 2.8422e-09 deg/d
Q 3.25181231865388 2.5794e-08 au
  Orbit Determination Parameters
   # obs. used (total)      714  
   data-arc span      7819 days (21.41 yr)  
   first obs. used      1998-12-24  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47069  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:19:28  

Additional Information
 Earth MOID = .917813 au 
 Jupiter MOID = 2.28294 au 
 T_jup = 3.342 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457269.5 (2015-Sep-04.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2614238657579727 6.9868e-08  
q 1.901690891287558 1.8825e-07 au
tp 2457019.932071577292
(2014-Dec-28.43207158)
6.2008e-05 TDB
node 1.812145006846122 1.5266e-05 deg
peri 38.69769744903402 2.3285e-05 deg
i 13.38997739595658 9.1352e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      714  
   data-arc span      7819 days (21.41 yr)  
   first obs. used      1998-12-24  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47069  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:19:28  

Additional Information
 Jupiter MOID = 2.28294 au 
 T_jup = 3.342 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.881505540645597E-15 -1.312477981877494E-14 -3.495239370209562E-12 -4.178929897644255E-15 -9.383453738823609E-13 -3.490276578401155E-14
q -1.312477981877494E-14 3.543883181046549E-14 9.538210808650911E-12 1.109434741744678E-14 2.567893774328598E-12 9.52712574506133E-14
tp -3.495239370209562E-12 9.538210808650911E-12 3.844964062960786E-9 4.756553598175291E-12 1.092001798667418E-9 2.997067601715408E-11
node -4.178929897644255E-15 1.109434741744678E-14 4.756553598175291E-12 2.330597773631229E-10 -2.248009040248328E-10 -2.663842332853982E-11
peri -9.383453738823609E-13 2.567893774328598E-12 1.092001798667418E-9 -2.248009040248328E-10 5.421876826129085E-10 3.428624415782315E-11
i -3.490276578401155E-14 9.52712574506133E-14 2.997067601715408E-11 -2.663842332853982E-11 3.428624415782315E-11 8.345217453369466E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO454846  
diameter diameter 4.415 km 0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 23.5659 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.055   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249218 (2008 EO86)          Discovered 2008-Mar-07 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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