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17389 (1981 EN30)
Classification: Main-belt Asteroid          SPK-ID: 2017389
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1831733224177746 3.414e-08  
a 3.099525553773061 1.6004e-08 au
q 2.531775160169657 1.0988e-07 au
i 1.93574233407909 4.3782e-06 deg
node 58.82568078551062 0.00010791 deg
peri 278.5326075661368 0.00010855 deg
M 299.0272537538906 1.3089e-05 deg
tp 2459538.078294120562
(2021-Nov-19.57829412)
7.385e-05 TDB
period 1993.155850203437
5.46
1.5437e-05
4.226e-08
d
yr
n .180618088627267 1.3989e-09 deg/d
Q 3.667275947376466 1.8935e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1782  
   data-arc span      14404 days (39.44 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52983  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:02:24  

Additional Information
 Earth MOID = 1.5216 au 
 Jupiter MOID = 1.72406 au 
 T_jup = 3.195 
[ 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 13.33   n/a E2021B10  
diameter diameter 10.973 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17389 (1981 EN30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EN30 = 1998 HE64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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