Inici     Començant     Sobreviure a l'Univers    
Inhabited Sky
    News@Sky     Astro Fotografia     La Col·lecció     Fòrum     Blog New!     FAQ     Premsa     Login  

HD 2874


Contingut

Imatges

Carregar la teva Imatge

DSS Images   Other Images


Articles Relacionats

Absolute proper motions of open clusters. I. Observational data
Mean proper motions and parallaxes of 205 open clusters were determinedfrom their member stars found in the Hipparcos Catalogue. 360 clusterswere searched for possible members, excluding nearby clusters withdistances D < 200 pc. Members were selected using ground basedinformation (photometry, radial velocity, proper motion, distance fromthe cluster centre) and information provided by Hipparcos (propermotion, parallax). Altogether 630 certain and 100 possible members werefound. A comparison of the Hipparcos parallaxes with photometricdistances of open clusters shows good agreement. The Hipparcos dataconfirm or reject the membership of several Cepheids in the studiedclusters. Tables 1 and 2 are only available in electronic form at theCDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

UBV photometry of stars whose positions are accurately known. II
The present report on the UBV observations of stars with favorableastrometric history gives attention to stars of the BD zones lyingbetween 50 and 54 deg. These observations and their reductions wereperformed from August 1983 to August 1984, as described by Oja (1984).Results are presented as tables for both the standard stars and theprogram stars. Comparisons are conducted between the present Vmagnitudes and those of the NPZT (1982) and AGK3R (1978) catalogs.

An investigation of radius anomalies among short-period Cepheids
Simultaneous photometric and spectroscopic observations have beenobtained of two short-period Cepheids, SU Cas and TU Cas. The Wesselinkmethod of Barnes et al. was used to obtain radii. The radii are found toagree, within the expected error, with evolutionary values. Thisstrengthens the argument that the beat Cepheids are normal Cepheids inmixed-mode behavior rather than a separate class of objects and thatevolutionary masses and radii are correct.

Osservazioni fotografiche di stelle variabili in Cassiopea (KR, KL, IY, TU, UW, HI, GZ, HH Cassiopeiae)
Not Available

Enviar un nou article


Enllaços Relacionats

  • - No s'ha trobat enllaços -
Enviar un nou enllaç


Membre dels grups següents:


Dades d'Observació i Astrometria

Constel·lació:Cassiopeia
Ascensió Recta:00h32m34.37s
Declinació:+51°06'13.3"
Magnitud Aparent:8.277
Distancia:529.101 parsecs
Moviment propi RA:14.2
Moviment propi Dec:-6.3
B-T magnitude:8.6
V-T magnitude:8.304

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 2874
TYCHO-2 2000TYC 3260-1997-1
USNO-A2.0USNO-A2 1350-00571953
HIPHIP 2564

→ Sol·licitar més catàlegs i designacions de VizieR