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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936049472191535 7.3273e-08  
a 2.562651923807404 1.7931e-08 au
q 2.066509833357609 1.9565e-07 au
i 12.72636835930201 6.8681e-06 deg
node 4.133917028350997 2.5135e-05 deg
peri 177.7162859267648 3.1171e-05 deg
M 257.1844118638395 2.2002e-05 deg
tp 2459428.446345932016
(2021-Aug-01.94634593)
9.5033e-05 TDB
period 1498.417577804452
4.10
1.5727e-05
4.306e-08
d
yr
n .2402534549330954 2.5217e-09 deg/d
Q 3.058794014257198 2.1403e-08 au
  Orbit Determination Parameters
   # obs. used (total)      355  
   data-arc span      7164 days (19.61 yr)  
   first obs. used      2001-03-18  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54052  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 04:03:11  

Additional Information
 Earth MOID = 1.0693 au 
 Jupiter MOID = 1.90061 au 
 T_jup = 3.374 
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Orbital Elements at Epoch 2457404.5 (2016-Jan-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936939190499994 7.3356e-08  
q 2.066138554241983 1.9574e-07 au
tp 2457931.224444745371
(2017-Jun-26.72444475)
8.3494e-05 TDB
node 4.154822701285418 2.5115e-05 deg
peri 177.9000407742772 3.1161e-05 deg
i 12.7325529909382 6.8713e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      355  
   data-arc span      7164 days (19.61 yr)  
   first obs. used      2001-03-18  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54052  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 04:03:11  

Additional Information
 Jupiter MOID = 1.90061 au 
 T_jup = 3.374 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.381038149910796E-15 -1.432987801744895E-14 -3.807337133554513E-12 -4.201339507447348E-14 -7.182330854150399E-13 -1.611616587299445E-14
q -1.432987801744895E-14 3.831368472370869E-14 1.058600762483613E-11 1.094240054523396E-13 2.003201501993935E-12 4.477385387371758E-14
tp -3.807337133554513E-12 1.058600762483613E-11 6.971216700828509E-9 4.019662085580187E-11 1.553311785479789E-9 1.726966382374681E-11
node -4.201339507447348E-14 1.094240054523396E-13 4.019662085580187E-11 6.307564114377982E-10 -6.063542401511437E-10 -6.520454743946763E-11
peri -7.182330854150399E-13 2.003201501993935E-12 1.553311785479789E-9 -6.063542401511437E-10 9.710275452453364E-10 6.722681897724762E-11
i -1.611616587299445E-14 4.477385387371758E-14 1.726966382374681E-11 -6.520454743946763E-11 6.722681897724762E-11 4.721415674491304E-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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