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TYC 3625-1228-1


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New Estimates of the Solar-Neighborhood Massive Star Birthrate and the Galactic Supernova Rate
The birthrate of stars of masses >=10 Msolar is estimatedfrom a sample of just over 400 O3-B2 dwarfs within 1.5 kpc of the Sunand the result extrapolated to estimate the Galactic supernova ratecontributed by such stars. The solar-neighborhood Galactic-plane massivestar birthrate is estimated at ~176 stars kpc-3Myr-1. On the basis of a model in which the Galactic stellardensity distribution comprises a ``disk+central hole'' like that of thedust infrared emission (as proposed by Drimmel and Spergel), theGalactic supernova rate is estimated at probably not less than ~1 normore than ~2 per century and the number of O3-B2 dwarfs within the solarcircle at ~200,000.

Catalog of Galactic OB Stars
An all-sky catalog of Galactic OB stars has been created by extendingthe Case-Hamburg Galactic plane luminous-stars surveys to include 5500additional objects drawn from the literature. This work brings the totalnumber of known or reasonably suspected OB stars to over 16,000.Companion databases of UBVβ photometry and MK classifications forthese objects include nearly 30,000 and 20,000 entries, respectively.

BV Photometry of Northern Galactic Plane Luminous Stars. II. Faint Stars in the Second Galactic Quadrant
CCD-based BV photometry of 28 stars listed in volumes I, III, and V ofthe Case-Hamburg Luminous Stars in the Northern Milky Way catalog isreported. Twenty-four stars have B>12, including the binary-nucleusplanetary nebula M1-2.

UBV beta Database for Case-Hamburg Northern and Southern Luminous Stars
A database of photoelectric UBV beta photometry for stars listed in theCase-Hamburg northern and southern Milky Way luminous stars surveys hasbeen compiled from the original research literature. Consisting of over16,000 observations of some 7300 stars from over 500 sources, thisdatabase constitutes the most complete compilation of such photometryavailable for intrinsically luminous stars around the Galactic plane.Over 5000 stars listed in the Case-Hamburg surveys still lackfundamental photometric data.

Photoelectric photometry of selected SAO stars. III
Photometric observations of 131 SAO stars for use in calibrating dataobtained from the Near Infrared Photographic Sky Survey (NIPSS) arereported. The serial numbers of the primary NIPSS program fields inwhich the photometry was done are shown along with the approximateposition of each field and the number of stars observed in each field.The observations are listed, showing the SAO numbers of the programstars, their 1950 equatorial coordinates, the V magnitudes, and the(V-R) and (V-I) color indices. The mean errors in magnitudes and colorindices obtained by averaging deviations from the mean for each star areon the order of 0.02 mag.

The space distribution of stars in selected Milky Way regions derived from photometric and spectroscopic data. I. A region in Lacerta, Centre A.R. = 22h30m, Dec. = +48deg40' ((1900.0).
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Observation and Astrometry data

Constellation:Lacerta
Right ascension:22h43m31.49s
Declination:+48°15'19.5"
Apparent magnitude:9.097
Proper motion RA:1.6
Proper motion Dec:-2.2
B-T magnitude:8.982
V-T magnitude:9.088

Catalogs and designations:
Proper Names   (Edit)
TYCHO-2 2000TYC 3625-1228-1
USNO-A2.0USNO-A2 1350-17214330
HIPHIP 112206

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