SKY-MAP.ORG

Sopravvivere Nell'Universo

HD 47657

Contenuti

Immagini
Articoli relazionati
Link relazionati
Gruppi

Immagini

Carica la tua immagine

DSS Images Other Images

Articoli relazionati

Study of Neglected Variable Stars Classified as Type II Cepheids Four variable stars classified as Type II Cepheids have been studiedpartly based on new photometry and the Hipparcos photometric data. Thecorrect period is derived for V341 Ara and NW Pav and it is pointed outthat RR Mic and V1711 Sgr do not belong to Type II Cepheids, insteadthey may be semi-regular variables. The cycle length of theirvariability is also determined.
ICCD Speckle Observations of Binary Stars. XIII. Measurements During 1989- 1994 From the Cerro Tololo 4 M Telescope Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....111..936H&db_key=AST
Secondary UVBY standards in the Harvard E-regions Photoelectric uvby photometry for 201 stars which are already UBV (RI)cstandards is presented. The photoelectric data are closely tied to theCousins uvby standards and the stars should be suitable for use asfainter (7-11 mag) secondary standards.
UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue. Not Available
HD 47147 - A small-amplitude extreme metal-poor RRab pulsating variable The photometric variations and physical and kinematical properties of HD47147, a ninth magnitude metal-deficient star, are discussed. The longperiod (0.79732 days), the small amplitude (0.17 mag in the visualband), and the mean effective temperature of 6160 K of this RR Lyraepulsating variable can be understood by its location near the red edgeof the instability strip. The extreme Population II characteristics ofHD 47147 are confirmed by its kinematical properties. The temperatureand the relatively high luminosity derived are consistent with bothpossibilities that HD 47147 is a red horizontal branch star or that itis a suprahorizontal branch star actually evolving redward toward theasymptotic branch. Its low amplitude suggests the possibility that thered edge of the instability strip corresponds to a smooth transitionfrom variable to non-variable stars.
UBV photometry of E region standard stars of intermediate brightness Photometry data are given for 335 stars in the nine E regions.Observations were made using a photometer and filters on the 47 cmreflector at Cape Town. The stellar dispersions are summarized. Data arepresented in tabular form.
Up-To UBVRI Values for the E-Region Standard Stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1981A&AS...46....7V&db_key=AST
Photometric standard stars for the UBV and (RI)KC systems. Not Available
Fainter Standards for VRI Photometry in the E Regions Not Available
Standard magnitudes in the E regions. Not Available

Sottometti un nuovo articolo

Link relazionati

- Nessun link trovato -

Sottometti un nuovo link

Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:	Poppa
Ascensione retta:	06^h37^m30.33^s
Declinazione:	-45Â°35'39.5"
Magnitudine apparente:	8.275
Distanza:	1515.152 parsec
Moto proprio RA:	-6
Moto proprio Dec:	9.6
B-T magnitude:	8.209
V-T magnitude:	8.27

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 47657
TYCHO-2 2000	TYC 8104-1156-1
USNO-A2.0	USNO-A2 0375-02653588
HIP	HIP 31653

→ Richiesta di ulteriori cataloghi da VizieR