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4105 Tsia (1989 EK)
Classification: Main-belt Asteroid          SPK-ID: 2004105
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909622572991807 3.2918e-08  
a 2.704150078193405 1.158e-08 au
q 2.187759475185836 8.9733e-08 au
i 6.357653143355314 4.158e-06 deg
node 204.1275099028452 3.2639e-05 deg
peri 63.5844547642538 3.4318e-05 deg
M 210.5196581733469 1.0772e-05 deg
tp 2459274.913406318952
(2021-Mar-01.41340632)
4.9649e-05 TDB
period 1624.219100036418
4.45
1.0433e-05
2.856e-08
d
yr
n .2216449738781721 1.4237e-09 deg/d
Q 3.220540681200974 1.3791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2310  
   data-arc span      30518 days (83.55 yr)  
   first obs. used      1936-05-18  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46904  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:39:35  

Additional Information
 Earth MOID = 1.18065 au 
 Jupiter MOID = 1.89317 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456222.5 (2012-Oct-22.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1935987272990932 3.3126e-08  
q 2.178481691983072 9.0574e-08 au
tp 2456024.904125975042
(2012-Apr-07.40412597)
4.6616e-05 TDB
node 204.373146315537 3.2698e-05 deg
peri 62.94099356383504 3.4286e-05 deg
i 6.354310243030758 4.1566e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2310  
   data-arc span      30518 days (83.55 yr)  
   first obs. used      1936-05-18  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46904  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:39:35  

Additional Information
 Jupiter MOID = 1.89317 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.097320003372274E-15 -2.984664789307498E-15 -1.983011411496573E-13 -1.314415389882531E-15 -2.0607059715578E-14 -8.946137490638654E-17
q -2.984664789307498E-15 8.203589286934155E-15 4.777906461070137E-13 2.189929590968236E-15 4.453201521743309E-14 6.649109600857404E-16
tp -1.983011411496573E-13 4.777906461070137E-13 2.173081149046431E-9 4.959723697330318E-12 4.932660548939037E-10 9.104582797017125E-13
node -1.314415389882531E-15 2.189929590968236E-15 4.959723697330318E-12 1.069138791672852E-9 -1.060955787873881E-9 -7.456548853428375E-12
peri -2.0607059715578E-14 4.453201521743309E-14 4.932660548939037E-10 -1.060955787873881E-9 1.175540681776108E-9 7.591592517601862E-12
i -8.946137490638654E-17 6.649109600857404E-16 9.104582797017125E-13 -7.456548853428375E-12 7.591592517601862E-12 1.727744359544484E-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 12.8   n/a MPO384790  
diameter diameter 13.334 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.58745 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.119   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4105 Tsia (1989 EK)          Discovered 1989-Mar-05 by Helin, E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1989 EK = 1927 HB = 1936 KC = 1958 GJ = 1977 RF6 = 1982 VS10 = 1982 XQ4 = 1985 JC2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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