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JPL Small-Body Database Browser
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26084 (1981 EK17)
Classification: Main-belt Asteroid          SPK-ID: 2026084
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213866242037152 3.2019e-08  
a 2.464752313103225 1.1727e-08 au
q 2.165564350317326 8.0233e-08 au
i 5.687996857538535 5.8467e-06 deg
node 206.1324315962151 4.0219e-05 deg
peri 76.08873286197058 4.8011e-05 deg
M 216.7857825501073 2.6057e-05 deg
tp 2459162.766209696924
(2020-Nov-09.26620970)
0.00010287 TDB
period 1413.378078623467
3.87
1.0087e-05
2.762e-08
d
yr
n .2547089171997172 1.8178e-09 deg/d
Q 2.763940275889123 1.315e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1241  
   data-arc span      13903 days (38.06 yr)  
   first obs. used      1981-02-14  
   last obs. used      2019-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55414  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 00:55:40  

Additional Information
 Earth MOID = 1.15732 au 
 Jupiter MOID = 2.36004 au 
 T_jup = 3.471 
[ 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 14.8   n/a MPO384973  
rotation period rot_per 121.957 h n/a LCDB (Rev. 2019-January); 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.]

26084 (1981 EK17)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EK17 = 1998 UA8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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