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15217 (1981 ET19)
Classification: Main-belt Asteroid          SPK-ID: 2015217
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .139514984875225 4.742e-08  
a 2.410032257733945 1.1329e-08 au
q 2.073796643747389 1.1252e-07 au
i 1.914762559587023 3.8142e-06 deg
node 135.619446449378 0.00016304 deg
peri 115.0518516249701 0.00016373 deg
M 165.6199067131446 1.6844e-05 deg
tp 2458571.801035407880
(2019-Mar-29.30103541)
6.2368e-05 TDB
period 1366.572604374014
3.74
9.6356e-06
2.638e-08
d
yr
n .2634327651876975 1.8575e-09 deg/d
Q 2.746267871720501 1.2909e-08 au
  Orbit Determination Parameters
   # obs. used (total)      577  
   data-arc span      16036 days (43.90 yr)  
   first obs. used      1977-02-12  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55386  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:22:47  

Additional Information
 Earth MOID = 1.05888 au 
 Jupiter MOID = 2.28193 au 
 T_jup = 3.506 
[ 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 16.2   n/a MPO337387  
rotation period rot_per 14.023 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

15217 (1981 ET19)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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