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HD 12994


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מאמרים קשורים

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.

Two Be Stars with Variable Spectra
Inspection of a recent Burrell Schmidt objective-prism plate indicatesthat the emission characteristics of the well-known Perseus clustermember HD 14422=V424 Per have greatly diminished. Further, the late -Bfield star HD 12994 now exhibits strong Balmer emission. (SECTION:Stars)

Early-type stars in the stellar associations Per OB1, SCO OB1, and CYG OB1 by observations with space telescope 'Glazar'
This paper presents results of observations at 1640 A carried out inSeptember 1988 with the Soviet space telescope Glazar on the regions ofstellar associations Per OB1, Sco OB1, and Cyg OB1. Thirty twophotographs were obtained, on which 94 images of stars were identifiedand measured. In stellar associations Per OB1, Sco OB1, and Cyg OB1, 42,22, and 30 hot stars brighter than 10 mag at 1640 A were detected,respectively. A comparison of Glazar measurements of stellar magnitudeswith those available from TD-1 telescope measurements and from ANSmeasurements showed reasonably good agreement.

The Distribution of Early Type Stars in the Direction of Stellar Associations PERSEUS-OB1 SCORPIUS-OB1 and CYGNUS-OB1
Not Available

2000 A UV imaging of a 6 deg diameter field around the H and Chi Persei double cluster
A stellar field centered close to the h and Chi per double cluster hasbeen observed at 2000 A by the stratospheric balloon-born telescope ofthe SCAP-2000 program. It is shown that the prevailing extinction lawproduces greater extinction at 1965 A than is predicted by the meanextinction law. The results suggest the presence of an H2 cloud in frontof h and Chi Per in the second absorbing layer and in the local arm. Agroup of hot stars centered at the same distance as the molecular cloudmay form an association of OB stars in the local arm.

On the Variability of the Suspected Beta Cephei Stars V351, V356, V357 Per
Not Available

Catalogue d'etoiles O et B.
Not Available

Vitesses radiales dans la region de h+chi Per.
Not Available

Etude pour chaque champ de l'absorption et de la repartition des vitesses radiales EN fonction de la distance.
Not Available

La mesure des vitesses radiales auprisme objectif. VI. -Liste des vitesses radiales déterminées au prisme objectif à vision directe
Not Available

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תצפית ומידע אסטרומטרי

קבוצת-כוכבים:פרסאוס
התרוממות ימנית:02h09m02.04s
סירוב:+57°02'09.5"
גודל גלוי:8.481
מרחק:10000000 פארסק
תנועה נכונה:3.1
תנועה נכונה:-1.5
B-T magnitude:8.476
V-T magnitude:8.481

קטלוגים וכינוים:
שם עצם פרטי
HD 1989HD 12994
TYCHO-2 2000TYC 3693-1653-1
USNO-A2.0USNO-A2 1425-02995626
HIPHIP 10021

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