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24631 (1981 EB21)
Classification: Main-belt Asteroid          SPK-ID: 2024631
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619476296729129 3.3993e-08  
a 3.104879065343357 1.76e-08 au
q 2.602051260289951 1.022e-07 au
i 2.220511306404682 3.8102e-06 deg
node 298.0240419157758 0.00011375 deg
peri 162.5160987469528 0.00011463 deg
M 200.5741813035041 1.5887e-05 deg
tp 2460281.455872769749
(2023-Dec-02.95587277)
9.25e-05 TDB
period 1998.32195814913
5.47
1.6992e-05
4.652e-08
d
yr
n .1801511505850821 1.5318e-09 deg/d
Q 3.607706870396763 2.0451e-08 au
  Orbit Determination Parameters
   # obs. used (total)      928  
   data-arc span      15231 days (41.70 yr)  
   first obs. used      1979-11-22  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5225  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:19:34  

Additional Information
 Earth MOID = 1.61925 au 
 Jupiter MOID = 1.55255 au 
 T_jup = 3.199 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457205.5 (2015-Jul-02.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .165428609713178 3.4134e-08  
q 2.586270873371698 1.03e-07 au
tp 2456292.508737647685
(2012-Dec-31.00873765)
7.6325e-05 TDB
node 298.044867665338 0.00011373 deg
peri 162.4440374889024 0.00011456 deg
i 2.223255860979559 3.8116e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      928  
   data-arc span      15231 days (41.70 yr)  
   first obs. used      1979-11-22  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5225  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:19:34  

Additional Information
 Jupiter MOID = 1.55255 au 
 T_jup = 3.199 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.165110349152592E-15 -3.481411359280144E-15 3.126526395764247E-14 2.168896995840702E-15 3.787031209898256E-14 -1.610611960465366E-16
q -3.481411359280144E-15 1.060880642172015E-14 1.37239038862354E-13 -3.513458489461096E-15 -5.658918836251713E-14 4.76425770470253E-16
tp 3.126526395764247E-14 1.37239038862354E-13 5.825452198380823E-9 -6.524098164593354E-13 1.082204105360127E-9 1.091622102391217E-12
node 2.168896995840702E-15 -3.513458489461096E-15 -6.524098164593354E-13 1.293386937932301E-8 -1.292337943194288E-8 3.023565054317122E-11
peri 3.787031209898256E-14 -5.658918836251713E-14 1.082204105360127E-9 -1.292337943194288E-8 1.312472686839462E-8 -3.003488952751198E-11
i -1.610611960465366E-16 4.76425770470253E-16 1.091622102391217E-12 3.023565054317122E-11 -3.003488952751198E-11 1.452863230678174E-11

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 14.69   n/a MPO636428  

24631 (1981 EB21)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010606/Numbers.arcLast Updated: 2004-04-19

[ 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
1900-Aug-08 16:12 00:03 Jupiter 1.81843640809117 1.8184347036806 1.8184381125004 2.02009226467954 1.77459247196564 2415240.175296095 3.25062556049342 75.1376708479071 15.6687528038129 76.499942996254 1318174.35341939 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
1951-Aug-17 22:29 00:02 Jupiter 1.91623017808758 1.91622905168821 1.91623130448717 3.24242949105195 3.10311103570204 2433876.436720106 1.76487130535742 78.658991551997 24.2817188451576 66.196362532699 1940107.00738068 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
1961-Jul-13 21:29 00:02 Jupiter 1.55799857617507 1.5579981911757 1.55799896117505 1.57701225980614 1.18306651427423 2437494.395206957 1.5219832498827 150.686161792721 59.6393852501597 53.9191907245113 2761708.40603671 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
1971-Jun-21 05:34 00:01 Jupiter 1.9260774348068 1.92607666917903 1.92607820043447 2.35908942781319 2.16466436645909 2441123.732260311 1.20488571450001 52.5229228132318 12.0441916822006 74.1047436662864 2191032.43471018 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
2022-Jun-30 11:54 < 00:01 Jupiter 1.81314653556907 1.81314609668099 1.81314697445716 2.68929364327039 2.50957925717878 2459760.995530887 0.282447611803909 43.5575298394962 9.64279929338396 -82.3929660883613 2805305.59264105 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
2032-May-24 13:16 < 00:01 Jupiter 1.57156347975927 1.57156307764414 1.57156388187507 1.5679677436464 1.17498371742606 2463377.052701578 0.536866290651374 144.791196358111 52.7237873706813 53.9795737834478 3253274.31298128 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
2093-May-08 18:55 00:02 Jupiter 1.71480177785864 1.71480080336592 1.71480275235117 2.21054471650494 1.97449041709707 2485641.288231745 2.3045147243285 90.2420241125769 9.83827839644255 -87.7984308363569 1578180.36937406 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
2103-Apr-05 02:07 00:03 Jupiter 1.62274769923022 1.62274667662362 1.62274872183591 1.65316575380662 1.29962334425808 2489258.588246407 2.52612843922702 107.532723242641 43.9179054433981 55.7859472124663 1875530.82479528 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
2164-Mar-16 08:32 00:04 Jupiter 1.63311260559637 1.63311122481598 1.63311398637546 1.85332009318297 1.54838133689331 2511519.855870075 4.32816881412728 133.896601377475 43.9606110644791 -68.4935954179524 1104067.38266205 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
2174-Feb-13 12:26 00:04 Jupiter 1.69796333514018 1.69796115024532 1.69796552003052 1.81801596025959 1.51904235831213 2515141.018160304 4.48562224912009 62.4731693365919 35.8284374702498 74.7487413251298 718601.51546589 T 19 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:37 2021-Aug-25 15:19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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