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JPL Small-Body Database Browser
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347331 (2011 UE121)
Classification: Main-belt Asteroid          SPK-ID: 2347331
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1033591749286041 7.7628e-08  
a 3.110319647742104 4.7559e-08 au
q 2.788839575187254 2.2843e-07 au
i 9.642595648795076 1.1319e-05 deg
node 20.77859757215712 4.0147e-05 deg
peri 101.4995383436895 6.6868e-05 deg
M 135.4119834570478 5.388e-05 deg
tp 2458246.865864684775
(2018-May-08.36586468)
0.00029714 TDB
period 2003.576653904777
5.49
4.5954e-05
1.258e-07
d
yr
n .1796786757813307 4.1211e-09 deg/d
Q 3.431799720296955 5.2475e-08 au
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      9013 days (24.68 yr)  
   first obs. used      1994-09-06  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63293  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 09:25:08  

Additional Information
 Earth MOID = 1.82468 au 
 Jupiter MOID = 1.67922 au 
 T_jup = 3.189 
[ 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 15.7   n/a MPO434188  

347331 (2011 UE121)          Discovered 2005-Sep-11 by Spacewatch at Kitt Peak
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03

[ hide close-approach data ]
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
1940-Jul-07 07:10 00:05 Jupiter 1.90838317512255 1.9083804022459 1.90838594800408 4.09033369981121 3.9803446802371 2429817.798592427 5.00198567343979 242.071446345539 71.8477523540834 -62.7028371510556 970228.816693287 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
1950-Jul-18 03:04 00:05 Jupiter 1.69569218103457 1.69569105910928 1.69569330296141 2.64282480430081 2.44652699129168 2433480.628099912 4.61205893830115 304.23046365639 55.4489437274512 -79.6485680216895 876796.095914065 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
2011-Jun-21 21:50 < 00:01 Jupiter 1.83996881747973 1.8399678209103 1.83996981405061 3.87550004360744 3.75483799083142 2455734.409648726 0.501292596037295 200.984792388176 35.0328635287618 -82.4141220154435 1390828.11494124 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
2021-Jun-25 09:02 < 00:01 Jupiter 1.7163367317412 1.71633561244406 1.71633785103774 2.48706280558398 2.28001520861648 2459390.876580148 0.839036601511447 183.670534329413 44.0956031780637 -88.1054773354141 1011323.47213451 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
2082-Jun-04 05:06 00:05 Jupiter 1.7783459544586 1.77834374252516 1.77834816639456 3.68017470822391 3.54839259409406 2481649.712736752 4.76766510627557 267.147918582519 80.0734808292095 -77.4901325497236 835011.644352623 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
2092-Jun-01 05:53 00:06 Jupiter 1.7522083327341 1.75220591093005 1.75221075454422 2.37001095400996 2.15641976576447 2485299.745363222 5.99380561073405 266.397485061248 99.1452233188934 -58.9736569688632 1064328.5991055 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
2153-May-19 01:58 00:10 Jupiter 1.72521229046366 1.72520895936594 1.72521562155981 3.50646470617469 3.3635339285481 2507565.582061303 9.61404661451732 304.20488322267 137.322772862907 -83.7504152688388 542325.080505543 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25
2163-May-10 05:10 00:11 Jupiter 1.80203251997485 1.80202785158829 1.80203718837667 2.31078983116422 2.09754023238873 2511208.715207719 11.3545030691192 386.581584957545 110.61368874556 -43.9698479665303 1245978.65414252 T 6 CATAB v2.0e-lin.ifort 2019-May-30 09:25:11 2019-May-30 09:25

Alternate Designations
 2011 UE121 = 2008 EF77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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