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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 ]

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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 
[ 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-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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1929-Sep-09 17:05 00:02 Jupiter 1.86918697115983 1.86918666758087 1.86918727473869 2.28226170381893 2.07422708836558 2425864.211703812 1.56423375237205 107.926864524841 23.8250290635518 84.8646324368755 2189540.82583168 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
1965-Mar-21 03:42 < 00:01 Jupiter 1.8772960269269 1.8772957214327 1.877296332421 2.32547650833781 2.1226057857247 2438840.654047467 0.884167852709112 75.5136878488901 19.7269074924603 -89.6419112714365 2430158.43304565 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
2000-Sep-26 13:57 < 00:01 Jupiter 1.87762884845979 1.87762853820044 1.87762915871915 2.36247530799994 2.16311439022782 2451814.081109364 0.260078350312251 54.5381702928099 15.2945325532637 -81.4898213875868 2888247.45408311 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
2036-Apr-03 13:52 < 00:01 Jupiter 1.88939308465046 1.88939275143499 1.88939341786582 2.42230512821906 2.22956365541805 2464787.077922684 0.472154216369986 57.8348047214874 14.2320581982384 -83.4553454646414 2557364.45532437 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
2071-Oct-07 03:50 00:01 Jupiter 1.89557627446795 1.89557586019716 1.89557668873895 2.47968038944757 2.29240734675776 2477756.659775524 1.12213890418019 87.0182525547804 14.2310701319473 -87.4836590726701 2229860.85316668 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
2107-Apr-07 16:41 00:02 Jupiter 1.91266755576403 1.91266695090578 1.91266816062401 2.56751308134866 2.38881264223248 2490722.195432551 1.80136924467867 127.565270331776 12.8852283246796 -86.7293023592831 2201389.90888696 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
2142-Oct-04 04:59 00:03 Jupiter 1.9290035597559 1.92900270312558 1.92900441639049 2.65827422853021 2.48761430487553 2503685.707584803 2.49897406916054 172.897734197676 12.0731393128152 -85.2091131180841 2256694.29563433 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40
2178-Mar-26 15:13 00:03 Jupiter 1.95238890079078 1.95238764744921 1.95239015414 2.77925437388447 2.61850659835554 2516643.134307688 3.20551874553089 221.185851634688 11.7608918230791 -82.3326744375691 2342259.54101327 T 35 CATAB v2.0f-lin.ifort 2019-Dec-13 21:39:56 2019-Dec-13 21:40

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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