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HD 183125


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Photometric observations of RR Lyrae covering half a century
4403 photographic observations obtained in the years 1943-1950, 2611white light observations from the years 1550-1957, altogether 31794 UBVobservations collected in the years 1958-1981 and 7135 observations madein the Stromgren uvby and Hβ wide/narrow band photometric systembetween 1990 and 1993 are published,

The visual surface brightness relation and the absolute magnitudes of RR Lyrae stars. II - RR Lyrae and X ARIETIS
The theoretical surface brightness relation for RR Lyrae stars has beencombined with new VR photometry to determine distances, radii, andabsolute magnitudes for X Arietis and RR Lyrae. For X Arietis, apulsational variation in the radius from 5.06 solar radii to 5.96 solarradii, a distance of 495 + or - 50 pc, and an intensity mean absolutemagnitude of +0.59 + or - 0.25 is obtained. The corresponding quantitiesfor RR Lyrae are 4.81-5.67 solar radii, 263 + or - 39 pc, and anintensity mean absolute magnitude of +0.61 + or - 0.35. The largererrors quoted for RR Lyrae are due to uncertainties arising from theBlazhko effect. Results are discussed in the context of the dependenceof RR Lyrae absolute magnitudes on metal abundance.

Photoelectric Observations of Rr-Lyrae in 1975
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Photo-electric observations of RR Lyrae (Errata: 11 270)
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Observation and Astrometry data

Constellation:こと座
Right ascension:19h26m05.50s
Declination:+42°19'34.3"
Apparent magnitude:7.985
Distance:137.552 parsecs
Proper motion RA:19.9
Proper motion Dec:44.6
B-T magnitude:8.363
V-T magnitude:8.017

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 183125
TYCHO-2 2000TYC 3142-1187-1
USNO-A2.0USNO-A2 1275-11382901
HIPHIP 95548

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