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11577 Einasto (1994 CO17)
Classification: Main-belt Asteroid          SPK-ID: 2011577
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1447762431833194 2.1338e-08  
a 2.452362253503217 7.9028e-09 au
q 2.097318459516441 5.1699e-08 au
i 4.025523612522627 8.0126e-07 deg
node 75.60062468107226 5.2197e-06 deg
peri 206.4655222124824 6.1187e-06 deg
M 245.4061553659509 4.7924e-06 deg
tp 2459647.013044270743
(2022-Mar-08.51304427)
2.0379e-05 TDB
period 1402.734121110949
3.84
6.7805e-06
1.856e-08
d
yr
n .2566416504610897 1.2406e-09 deg/d
Q 2.807406047489992 9.047e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3206  
   data-arc span      16762 days (45.89 yr)  
   first obs. used      1975-04-15  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41506  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:43:22  

Additional Information
 Earth MOID = 1.07989 au 
 Jupiter MOID = 2.32016 au 
 T_jup = 3.477 
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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 13.84   n/a E2021B10  
rotation period rot_per 11.3441 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

11577 Einasto           Discovered 1994 Feb. 8 by E. W. Elst at the European Southern Observatory.
Estonian astronomer Jaan Einasto (b. 1929) discovered the presence of dark matter in the universe in 1974, and he noted the regular cell-like structure in the large scale-distribution of superclusters of galaxies in 1977. Still a very active scientist, he has written more than 250 scientific papers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090209/MPCPages.arcLast Updated: 2009-02-11

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Alternate Designations
 1994 CO17 = 1975 GE = 1979 HD4 = 1995 QU2 
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