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HD 157354


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Study of Neglected Variable Stars Classified as Type II Cepheids
Four variable stars classified as Type II Cepheids have been studiedpartly based on new photometry and the Hipparcos photometric data. Thecorrect period is derived for V341 Ara and NW Pav and it is pointed outthat RR Mic and V1711 Sgr do not belong to Type II Cepheids, insteadthey may be semi-regular variables. The cycle length of theirvariability is also determined.

UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue.
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UBV photometry of E region standard stars of intermediate brightness
Photometry data are given for 335 stars in the nine E regions.Observations were made using a photometer and filters on the 47 cmreflector at Cape Town. The stellar dispersions are summarized. Data arepresented in tabular form.

Some Variable Stars in the SRS Catalogue
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Photometric standard stars for the UBV and (RI)KC systems.
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Fainter Standards for VRI Photometry in the E Regions
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Standard magnitudes in the E regions.
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Observation and Astrometry data

Constellation:さいだん座
Right ascension:17h24m59.30s
Declination:-45°53'37.8"
Apparent magnitude:8.054
Distance:10000000 parsecs
Proper motion RA:6
Proper motion Dec:-1.5
B-T magnitude:10.149
V-T magnitude:8.227

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 157354
TYCHO-2 2000TYC 8341-721-1
USNO-A2.0USNO-A2 0375-31614810
HIPHIP 85234
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