Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
26084 (1981 EK17)
Classification: Main-belt Asteroid          SPK-ID: 2026084
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .121952496256763 2.991e-08  
a 2.465466120018611 9.5951e-09 au
q 2.164796372245866 7.7187e-08 au
i 5.687354568730701 5.0065e-06 deg
node 206.1078689948784 2.999e-05 deg
peri 76.08928075620429 3.9085e-05 deg
M 9.650515003231282 2.2618e-05 deg
tp 2459162.595133210805
(2020-Nov-09.09513321)
8.8877e-05 TDB
period 1413.992107109431
3.87
8.2545e-06
2.26e-08
d
yr
n .2545983094176771 1.4863e-09 deg/d
Q 2.766135867791357 1.0765e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1610  
   data-arc span      14431 days (39.51 yr)  
   first obs. used      1981-02-14  
   last obs. used      2020-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50783  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:30:58  

Additional Information
 Earth MOID = 1.15526 au 
 Jupiter MOID = 2.35764 au 
 T_jup = 3.470 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457158.5 (2015-May-16.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216145977976779 2.9994e-08  
q 2.165785872530599 7.7317e-08 au
tp 2457747.195276307311
(2016-Dec-24.69527631)
9.06e-05 TDB
node 206.201764642387 3.0029e-05 deg
peri 75.56052258273291 3.9093e-05 deg
i 5.682504628305463 5.0037e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1610  
   data-arc span      14431 days (39.51 yr)  
   first obs. used      1981-02-14  
   last obs. used      2020-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50783  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:30:58  

Additional Information
 Jupiter MOID = 2.35764 au 
 T_jup = 3.470 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.996580417733669E-16 -2.307250144815207E-15 -2.021334079381931E-13 3.425203262380434E-15 -1.803146940316808E-14 -1.127974531480779E-15
q -2.307250144815207E-15 5.977855416269968E-15 3.407245941051705E-13 -9.072760281664234E-15 -6.739703705829323E-15 3.081818401415677E-15
tp -2.021334079381931E-13 3.407245941051705E-13 8.208281172710637E-9 -2.35327807736739E-11 2.270010960236057E-9 4.545787070277144E-13
node 3.425203262380434E-15 -9.072760281664234E-15 -2.35327807736739E-11 9.017475552813104E-10 -9.03057264270448E-10 3.926885258736675E-12
peri -1.803146940316808E-14 -6.739703705829323E-15 2.270010960236057E-9 -9.03057264270448E-10 1.528300157047131E-9 -3.878984469995911E-12
i -1.127974531480779E-15 3.081818401415677E-15 4.545787070277144E-13 3.926885258736675E-12 -3.878984469995911E-12 2.503715393368044E-11

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 14.82   n/a E2020-QM5  
rotation period rot_per 121.957 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.]

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-13 05:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin