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123941 (2001 EM18)
Classification: Main-belt Asteroid          SPK-ID: 2123941
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1717362713970151 4.6404e-08  
a 3.108550402437665 2.3403e-08 au
q 2.57469954687333 1.4123e-07 au
i 17.5434955376206 5.3572e-06 deg
node 150.5299534580315 1.3261e-05 deg
peri 56.86854501875465 1.8635e-05 deg
M 135.157746347019 1.3937e-05 deg
tp 2458248.922555721732
(2018-May-10.42255572)
7.4345e-05 TDB
period 2001.86735317035
5.48
2.2607e-05
6.189e-08
d
yr
n .1798320949836508 2.0308e-09 deg/d
Q 3.642401258002 2.7422e-08 au
  Orbit Determination Parameters
   # obs. used (total)      828  
   data-arc span      8446 days (23.12 yr)  
   first obs. used      1997-09-07  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55655  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:31:22  

Additional Information
 Earth MOID = 1.619 au 
 Jupiter MOID = 1.49872 au 
 T_jup = 3.126 
[ 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 14.3   n/a MPO493706  

123941 (2001 EM18)          Discovered 2001-Mar-13 by LONEOS at Anderson Mesa
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ 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
1916-Feb-06 17:40 00:03 Jupiter 1.51631744689321 1.51631589905688 1.51631899479755 4.04866404890367 3.90825671749212 2420900.235816747 3.40442510898613 564.0935987383 29.9493329777418 82.0761876034113 2202111.15434458 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31
1926-May-31 11:22 00:03 Jupiter 1.92200920072493 1.92200595328825 1.9220124481685 4.76372221091917 4.67029512165152 2424666.973814436 3.1595426616429 253.36131919767 54.168969969866 -52.4537256837556 2936015.6921822 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31
1987-Dec-24 21:46 00:02 Jupiter 1.73866095121151 1.73865970994816 1.73866219247545 3.06770850572378 2.90456477929884 2447154.406729881 1.49855759980071 136.353972065816 77.8269757459851 86.9844170772455 1337351.97500108 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31
1998-Mar-21 13:48 < 00:01 Jupiter 1.62530257517139 1.6253019494555 1.62530320088783 4.55078766864472 4.43479122736727 2450894.075069437 0.650946286076002 109.38235690044 26.8533698732398 -82.4764247676844 2983192.89562323 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31
2069-Dec-25 17:44 00:02 Jupiter 1.50602272702821 1.50602217435894 1.50602327970081 4.20097274925584 4.0648893116818 2477106.238901169 1.76898976583715 330.23445610159 24.7857484911463 -88.8025481072599 2387291.19065093 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31
2141-Oct-13 22:44 00:05 Jupiter 1.61323838976265 1.61323577686694 1.61324100273952 3.54042675273798 3.38888357461225 2503330.447069230 5.02779233171526 621.939780561364 42.3356659619343 75.8681475480992 1490871.01625096 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31
2152-Jan-27 18:59 00:05 Jupiter 1.79612765864373 1.79612317340279 1.79613214393479 4.77320098457468 4.673358800536 2507088.290880639 4.9155525652407 533.541007543207 36.2629049883948 -66.0592578537844 3422315.18521038 T 23 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:24 2020-Nov-12 17:31

Alternate Designations
 2001 EM18 = 2002 LY6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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