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HD 59527


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HD 59864 - A new Beta Cephei-type variable star
Photoelectric observations of HD 59864 are reported. The star is foundto be a Beta Cephei-type variable. Frequency analysis of the dataindicates that the light variation consists of two short-periodcomponents. However, frequencies of the components cannot beunambiguously derived from the present data. Four pairs of frequenciesthat equally well represent the data are given.

Distribution of B5 to A5 stars at (l, b) = (253 deg, -7 deg)
A study to V of about 12 mag is conducted for the distribution ofinterstellar extinction and early type stars (up to A5) in the (l, b) =(253 deg, -7 deg) field. The space density of B5, B8-A0, and A2-A5 starsis found to be normal for a field outside the galactic plane, and thestellar and extinction data indicate that the direction in question liesout of the matter plane of the Milky Way at least to 3 kpc. The higherextinction of Bochun 15 and the absence of background galaxies, however,suggest the possible presence of the galactic warp at -7 deg, atdistances beyond about 5 kpc, as well as a total higher extinction thanthe maximum of E(B-V) = 0.53 for d greater than 10 kpc, as found at (l,b) = (245 deg, zero deg).

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Dades d'Observació i Astrometria

Constel·lació:Puppis
Ascensió Recta:07h28m56.68s
Declinació:-34°55'06.2"
Magnitud Aparent:6.903
Distancia:306.748 parsecs
Moviment propi RA:-8.7
Moviment propi Dec:4.8
B-T magnitude:6.763
V-T magnitude:6.892

Catàlegs i designacions:
Noms Propis
HD 1989HD 59527
TYCHO-2 2000TYC 7112-134-1
USNO-A2.0USNO-A2 0525-05232150
HIPHIP 36355

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