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High-Resolution Imaging of Dust Shells by Using Keck Aperture Masking and the IOTA Interferometer
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| Speckle Interferometry of New and Problem Hipparcos Binaries. II. Observations Obtained in 1998-1999 from McDonald Observatory
The Hipparcos satellite made measurements of over 9734 known doublestars, 3406 new double stars, and 11,687 unresolved but possible doublestars. The high angular resolution afforded by speckle interferometrymakes it an efficient means to confirm these systems from the ground,which were first discovered from space. Because of its coverage of adifferent region of angular separation-magnitude difference(ρ-Δm) space, speckle interferometry also holds promise toascertain the duplicity of the unresolved Hipparcos ``problem'' stars.Presented are observations of 116 new Hipparcos double stars and 469Hipparcos ``problem stars,'' as well as 238 measures of other doublestars and 246 other high-quality nondetections. Included in these areobservations of double stars listed in the Tycho-2 Catalogue andpossible grid stars for the Space Interferometry Mission.
| The 74th Special Name-list of Variable Stars
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| Classification of 831 two-micron sky survey sources south of +5 degrees.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975AJ.....80.1011H&db_key=AST
| The Distribution of the BD M-Type Stars Along the Galactic Equator.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1958ApJ...128..510N&db_key=AST
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Datos observacionales y astrométricos
| Constelación: | Águila |
| Ascensión Recta: | 19h05m48.19s |
| Declinación: | +12°12'27.2" |
| Magnitud Aparente: | 7.516 |
| Distancia: | 1298.701 parsecs |
| Movimiento Propio en Ascensión Recta: | 17.7 |
| Movimiento Propio en Declinación: | 2.8 |
| B-T magnitude: | 9.993 |
| V-T magnitude: | 7.721 |
Catálogos y designaciones:
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