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212102 (2005 EH154)
Classification: Main-belt Asteroid          SPK-ID: 2212102
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .193604936485731 7.378e-08  
a 2.562651921016496 1.8149e-08 au
q 2.066509858613061 1.9665e-07 au
i 12.72637069816028 7.208e-06 deg
node 4.133913888642377 2.5341e-05 deg
peri 177.7162889400976 3.1327e-05 deg
M 257.1844131638032 2.2049e-05 deg
tp 2459428.446339822119
(2021-Aug-01.94633982)		 9.5266e-05 TDB
period 1498.41757535663
4.10		 1.5918e-05
4.358e-08		 d
yr
n .2402534553255747 2.5522e-09 deg/d
Q 3.058793983419932 2.1662e-08 au
   Orbit Determination Parameters
   # obs. used (total)      347  
   data-arc span      6818 days (18.67 yr)  
   first obs. used      2001-03-18  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53492  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 02:41:53  

Additional Information
 Earth MOID = 1.0693 au 
 Jupiter MOID = 1.90061 au 
 T_jup = 3.374 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457301.5 (2015-Oct-06.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936051398704888 7.3878e-08  
q 2.066574766094902 1.9681e-07 au
tp 2457931.217105425791
(2017-Jun-26.71710543)		 8.3629e-05 TDB
node 4.154025681515783 2.5321e-05 deg
peri 177.8794886155917 3.1319e-05 deg
i 12.73218748963885 7.2113e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      347  
   data-arc span      6818 days (18.67 yr)  
   first obs. used      2001-03-18  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53492  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 02:41:53  

Additional Information
 Jupiter MOID = 1.90061 au 
 T_jup = 3.374 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.458008796223524E-15 -1.450974893416319E-14 -3.773877676189409E-12 -4.281865656505852E-14 -7.160327795935921E-13 -1.607979881540669E-14
q -1.450974893416319E-14 3.873579514553528E-14 1.051148403513299E-11 1.109942206647526E-13 1.998821658335315E-12 4.487365239171447E-14
tp -3.773877676189409E-12 1.051148403513299E-11 6.993728643778124E-9 4.000852867592773E-11 1.555282490098381E-9 1.7168517852839E-11
node -4.281865656505852E-14 1.109942206647526E-13 4.000852867592773E-11 6.411409760976243E-10 -6.163696945445932E-10 -7.2263234041801E-11
peri -7.160327795935921E-13 1.998821658335315E-12 1.555282490098381E-9 -6.163696945445932E-10 9.808838283798552E-10 7.402450614238033E-11
i -1.607979881540669E-14 4.487365239171447E-14 1.7168517852839E-11 -7.2263234041801E-11 7.402450614238033E-11 5.2002509823911E-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 16.2   n/a MPO454522  
diameter diameter 3.548 km 0.804 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212102 (2005 EH154)          Discovered 2005-Mar-08 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

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