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δβ Aps (Delta2 Apodis)



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Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.

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Binary star systems in which both components are normal late-type giantsare rare. HD 44780 and 65 Gem are shown to be such systems: they haveperiods of 577 and 1601 days respectively, and their spectra areconspicuously double-lined for considerable parts of their orbits. Theirmass ratios are very close to unity, although their luminosity ratiosare not. Attention is drawn to the imminent series of lunar occultationsof 65 Gem.

Evidence for starspots on single solar-like stars
H-alpha intermediate-band and narrowband and lambda 4530 photoelectricphotometry carried out for five single main-sequence stars arepresented. For HD 149661, HD 152391, and HD 201091 low amplitudevariations of up to 0.04 mag at lambda 4530 are found. These variationsare attributable to the presence of starspots, and in the cases of HD149661 and HD 201091, an anti-correlation between the light variationand H-alpha and Ca II emission is found. Conclusions drawn from thisstudy include the idea that these three stars have active chromospheres,and that the light variation/Ca II and H-alpha variations are similar towhat is found in RS CVn systems.

On the relationship between the apparent magnitudes given in several catalogues and the UBV system.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...15..215O&db_key=AST

The classification of intrinsic variable. III. Calibration of the luminosities of small amplitude red variables in the old disk population
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Spectral Classification of Visual Binaries Having Primaries Above the Main Sequence
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Observation and Astrometry data

Right ascension:16h20m26.80s
Apparent magnitude:5.27
Distance:203.252 parsecs
Proper motion RA:-1.5
Proper motion Dec:-31.3
B-T magnitude:7.104
V-T magnitude:5.411

Catalogs and designations:
Proper NamesDelta2 Apodis
Bayerδβ Aps
HD 1989HD 145388
TYCHO-2 2000TYC 9446-3516-1
USNO-A2.0USNO-A2 0075-05301109
BSC 1991HR 6021
HIPHIP 80057

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