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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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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1915557707983566 2.3822e-08  
a 2.704481408175762 9.2024e-09 au
q 2.186422387422829 6.6451e-08 au
i 6.358193990751407 4.293e-07 deg
node 204.0954689404464 8.0483e-06 deg
peri 63.76281387192768 8.7818e-06 deg
M 26.85870042266177 3.5282e-06 deg
tp 2459275.298799464128
(2021-Mar-01.79879946)
1.5581e-05 TDB
period 1624.517623946524
4.45
8.2915e-06
2.27e-08
d
yr
n .2216042440496482 1.1311e-09 deg/d
Q 3.222540428928694 1.0965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2892  
   data-arc span      31084 days (85.10 yr)  
   first obs. used      1936-05-18  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43691  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:57:47  

Additional Information
 Earth MOID = 1.17971 au 
 Jupiter MOID = 1.89044 au 
 T_jup = 3.330 
[ show covariance matrix ]

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 12.81   n/a E2021B10  
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. 2020-October); 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

[ show close-approach data ]
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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