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15686 (1981 EW33)
Classification: Main-belt Asteroid          SPK-ID: 2015686
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1149366041188469 4.5971e-08  
a 2.698765210707146 1.3422e-08 au
q 2.388578302074383 1.2736e-07 au
i 2.699711053197118 3.8073e-06 deg
node 251.9455142288244 9.9989e-05 deg
peri 106.0885612444514 0.00010113 deg
M 168.0549625881343 1.6341e-05 deg
tp 2458444.546778225694
(2018-Nov-22.04677823)
7.2145e-05 TDB
period 1619.369970678659
4.43
1.2081e-05
3.308e-08
d
yr
n .2223086796213272 1.6585e-09 deg/d
Q 3.00895211933991 1.4965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1122  
   data-arc span      16039 days (43.91 yr)  
   first obs. used      1977-04-24  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:06:10  

Additional Information
 Earth MOID = 1.38474 au 
 Jupiter MOID = 2.43318 au 
 T_jup = 3.357 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456960.5 (2014-Oct-30.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1147577440939997 4.6046e-08  
q 2.388480578083296 1.2754e-07 au
tp 2456817.568393257280
(2014-Jun-09.06839326)
7.0488e-05 TDB
node 252.2540997353071 0.00010028 deg
peri 104.3395019680954 0.00010142 deg
i 2.69532200413314 3.7996e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1122  
   data-arc span      16039 days (43.91 yr)  
   first obs. used      1977-04-24  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:06:10  

Additional Information
 Jupiter MOID = 2.43318 au 
 T_jup = 3.357 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.120228267574938E-15 -5.848576274413833E-15 3.432273284998558E-13 -6.313457781851012E-15 4.437049599316698E-14 8.138942043575048E-17
q -5.848576274413833E-15 1.6265249530947E-14 -8.742488600543537E-13 1.714348465025323E-14 -1.052050714374405E-13 -1.873193383171329E-17
tp 3.432273284998558E-13 -8.742488600543537E-13 4.968596137768631E-9 7.406275747661965E-12 1.098414401084112E-9 1.650939659134133E-13
node -6.313457781851012E-15 1.714348465025323E-14 7.406275747661965E-12 1.005701245311459E-8 -1.0043726393021E-8 -8.725772482623473E-11
peri 4.437049599316698E-14 -1.052050714374405E-13 1.098414401084112E-9 -1.0043726393021E-8 1.028588426119544E-8 8.718460164142003E-11
i 8.138942043575048E-17 -1.873193383171329E-17 1.650939659134133E-13 -8.725772482623473E-11 8.718460164142003E-11 1.443663887193643E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.94   n/a MPCxxxxx  

15686 (1981 EW33)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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