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11517 Esteracuna (1991 EA4)
Classification: Main-belt Asteroid          SPK-ID: 2011517
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1420492094325854 3.2966e-08  
a 3.125986138381556 1.7707e-08 au
q 2.681942278727235 9.7223e-08 au
i .5889620791258814 4.2382e-06 deg
node 342.0949441796482 0.00034354 deg
peri 119.6698909405048 0.00034391 deg
M 191.6524775168963 1.7762e-05 deg
tp 2460144.524416889435
(2023-Jul-19.02441689)
0.00010414 TDB
period 2018.733540401854
5.53
1.7152e-05
4.696e-08
d
yr
n .1783296273604973 1.5152e-09 deg/d
Q 3.570029998035876 2.0222e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1599  
   data-arc span      10740 days (29.40 yr)  
   first obs. used      1991-02-22  
   last obs. used      2020-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51169  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:49:05  

Additional Information
 Earth MOID = 1.69872 au 
 Jupiter MOID = 1.5773 au 
 T_jup = 3.199 
[ 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 13.37   n/a E2021B10  
diameter diameter 10.463 km 0.309 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 19.197 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.070   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11517 Esteracuna           Discovered 1991 Mar. 12 by H. Debehogne at the European Southern Observatory.
Maria Ester Acuna Castillo (b. 1951) was a caretaker at the Manuel Foster Observatory for several decades. She assisted astronomers during observations with the historical single-prism spectrograph mounted on a replica of the Lick Observatory telescope on Cerro San Cristobal in the heart of Santiago de Chile.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110715/MPCPages.arcLast Updated: 2011-07-20

[ show close-approach data ]
Alternate Designations
 1991 EA4 = 1997 GS3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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