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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1910865143378894 3.1876e-08  
a 2.703214106685033 1.0939e-08 au
q 2.186666345529578 8.7648e-08 au
i 6.358298834013251 4.0026e-06 deg
node 204.1157581655426 3.1875e-05 deg
peri 63.70329147425613 3.352e-05 deg
M 299.0867643858023 1.0897e-05 deg
tp 2459275.180774291920
(2021-Mar-01.68077429)
4.9616e-05 TDB
period 1623.375900951859
4.44
9.8535e-06
2.698e-08
d
yr
n .221760098686272 1.346e-09 deg/d
Q 3.219761867840488 1.3029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2382  
   data-arc span      30574 days (83.71 yr)  
   first obs. used      1936-05-18  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46264  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:04:33  

Additional Information
 Earth MOID = 1.17998 au 
 Jupiter MOID = 1.89497 au 
 T_jup = 3.331 
[ 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 12.8   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-August); 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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