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26800 (1981 EK1)
Classification: Main-belt Asteroid          SPK-ID: 2026800
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1101014821438936 7.8043e-08  
a 2.426691077112963 1.4318e-08 AU
q 2.159508792817464 1.9248e-07 AU
i 8.296955864226208 9.8342e-06 deg
node 351.8883526673629 3.6047e-05 deg
peri 131.3964807071588 5.5364e-05 deg
M 4.980780939156449 3.8118e-05 deg
tp 2456981.396404784180
(2014-Nov-19.89640478)
0.00014626 JED
period 1380.76626169792
3.78
1.222e-05
3.346e-08
d
yr
n .2607247946204234 2.3075e-09 deg/d
Q 2.693873361408461 1.5894e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      776  
   data-arc span      12503 days (34.23 yr)  
   first obs. used      1981-03-06  
   last obs. used      2015-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51856  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:53:53  

Additional Information
 Earth MOID = 1.18446 AU 
 T_jup = 3.488 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO337485  
rotation period rot_per 6.8197 h n/a LCDB (Rev. 2015-July); 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., in press.]

26800 (1981 EK1)          Discovered 1981-Mar-06 by Debehogne, H., DeSanctis, G. at La Silla
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EK1 = 1998 SO100 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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