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11517 Esteracuna (1991 EA4)
Classification: Main-belt Asteroid          SPK-ID: 2011517
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1462841721122787 4.4655e-08  
a 3.116429859842628 2.8672e-08 AU
q 2.660545497849564 1.3332e-07 AU
i .5898151172838955 6.6987e-06 deg
node 342.238379553388 0.00048608 deg
peri 118.6904812353233 0.00048653 deg
M 158.6704568957547 2.4841e-05 deg
tp 2456114.817561068031
(2012-Jul-06.31756107)
0.00013465 JED
period 2009.483581590668
5.50
2.7732e-05
7.593e-08
d
yr
n .1791505057807096 2.4724e-09 deg/d
Q 3.572314221835692 3.2867e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      8523 days (23.33 yr)  
   first obs. used      1991-02-22  
   last obs. used      2014-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55898  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:26:25  

Additional Information
 Earth MOID = 1.67732 AU 
 T_jup = 3.201 
[ 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 13.3 mag n/a MPO263453  

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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