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Submit a new article| Speckle Interferometry at the Observatorio Astronómico Nacional. III We present speckle interferometric measurements of binary starsperformed during August of 2010 with the 1.5 m telescope and duringNovember of 2010 with the 2.1 m telescope of the ObservatorioAstronómico Nacional at SPM (Mexico). We report here the resultsof 238 measurements of 225 pairs with a primary limiting magnitude of V= 12.2; 211 of them have separations less than 1''. The mean error inseparation is 0.03 arcsec 1.5° in position angle. Some of theposition angles were determined with the usual 180° ambiguity.
 
 
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| Constellation: | Περσεύς |  | Right ascension: | 03h35m26.37s |  | Declination: | +35°28'47.4" |  | Apparent magnitude: | 8.519 |  | Distance: | 37.411 parsecs |  | Proper motion RA: | -42.1 |  | Proper motion Dec: | -31 |  | B-T magnitude: | 9.751 |  | V-T magnitude: | 8.621 |  Catalogs and designations:
 
 
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