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305509 (2008 ET146)
Classification: Main-belt Asteroid          SPK-ID: 2305509
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04151513523048981 6.6321e-08  
a 3.093300984785871 4.8759e-08 au
q 2.964882176093878 1.8686e-07 au
i 11.20827982183543 6.895e-06 deg
node 104.8958222731141 3.752e-05 deg
peri 14.5473757273076 0.00010477 deg
M 142.2445548505529 0.00010306 deg
tp 2458215.327923109904
(2018-Apr-06.82792311)
0.00056088 TDB
period 1987.154784078793
5.44
4.6984e-05
1.286e-07
d
yr
n .1811635424096514 4.2834e-09 deg/d
Q 3.221719793477864 5.0783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      154  
   data-arc span      6760 days (18.51 yr)  
   first obs. used      2000-11-27  
   last obs. used      2019-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66585  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:54:48  

Additional Information
 Earth MOID = 1.98251 au 
 Jupiter MOID = 1.87526 au 
 T_jup = 3.193 
[ 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 15.8   n/a MPO476361  

305509 (2008 ET146)          Discovered 2008-Mar-10 by CSS at Catalina
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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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
1951-Mar-15 01:24 00:05 Jupiter 1.90186968883856 1.90186838478667 1.90187099290104 3.0683344943021 2.9195805241277 2433720.558421246 4.68496980904612 275.83038624144 24.3540096495574 77.5896775343427 2027693.81871222 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
1961-Feb-09 21:36 00:04 Jupiter 1.95626264755325 1.9562617220745 1.95626357303657 4.02360887887929 3.91452021292936 2437340.400337972 3.59889079446726 225.680589106889 30.5620333307052 -82.3002948289015 2430558.87854391 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
2011-May-22 12:40 < 00:01 Jupiter 1.96795564281438 1.96795480777131 1.96795647785733 3.17836995811664 3.03993765543375 2455704.027503729 0.374159503902518 91.471601546291 30.6920156229701 83.358674317425 1827145.86458173 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
2021-Mar-18 13:18 < 00:01 Jupiter 1.87917388708555 1.87917308999294 1.87917468417804 3.65841249200063 3.53305788902469 2459292.053883284 0.575599234325159 80.1416080075248 33.8480893096549 86.0639728031491 1939352.38492003 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
2081-May-09 12:17 00:05 Jupiter 1.88401922531172 1.88401848484939 1.88401996577394 3.14561834866966 2.99929147063181 2481259.011766228 5.00247003650815 313.865814126021 29.2160588887406 85.6979739808996 1968872.27232275 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
2141-Jul-19 04:23 00:10 Jupiter 1.93497502699593 1.93497385038248 1.93497620365845 2.97113356193314 2.81995529668906 2503243.682853704 9.77003461761369 644.940774695484 28.0324336808325 87.2791306063141 2000574.40366695 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
2151-May-23 16:52 00:09 Jupiter 1.91018677849859 1.91018464690128 1.91018891016224 3.82200131309088 3.7041660586973 2506839.202738863 9.39935590794456 615.805178164192 31.6595639394056 -82.4356840180922 2214860.78382578 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:50 2019-Sep-24 05:54
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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