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17385 (1981 EU13)
Classification: Main-belt Asteroid          SPK-ID: 2017385
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1866942015401687 2.6393e-08  
a 2.31180350398476 6.6471e-09 au
q 1.880203194690562 6.1175e-08 au
i 8.490389791669312 4.295e-06 deg
node 198.965158438978 2.1357e-05 deg
peri 274.0352334694204 2.4732e-05 deg
M 162.2455531235164 1.2346e-05 deg
tp 2458621.877783036677
(2019-May-18.37778304)
4.3083e-05 TDB
period 1283.881093173727
3.52
5.5373e-06
1.516e-08
d
yr
n .2803997986371835 1.2093e-09 deg/d
Q 2.74340381327896 7.888e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1265  
   data-arc span      14455 days (39.58 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51878  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:02:17  

Additional Information
 Earth MOID = .918775 au 
 Jupiter MOID = 2.42252 au 
 T_jup = 3.546 
[ 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 15.39   n/a E2021B10  
diameter diameter 4.031 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17385 (1981 EU13)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EU13 = 1990 WQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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