WIKISKY.ORG

Sopravvivere Nell'Universo

HD 140625

Contenuti

Immagini
Articoli relazionati
Link relazionati
Gruppi

Immagini

Carica la tua immagine

DSS Images Other Images

Articoli relazionati

Speckle interferometry of nearby multiple stars. III. Not Available
Visual binary orbits and masses POST HIPPARCOS The parallaxes from Hipparcos are an important ingredient to derive moreaccurate masses for known orbital binaries, but in order to exploit theparallaxes fully, the orbital elements have to be known to similarprecision. The present work gives improved orbital elements for some 205systems by combining the Hipparcos astrometry with existing ground-basedobservations. The new solutions avoid the linearity constraints andomissions in the Hipparcos Catalog by using the intermediate TransitData which can be combined with ground-based observations in arbitarilycomplex orbital models. The new orbital elements and parallaxes give newmass-sum values together with realistic total error-estimates. To getindividual masses at least for main-sequence systems, the mass-ratioshave been generally estimated from theoretical isochrones and observedmagnitude-differences. For some 25 short-period systems, however, trueastrometric mass-ratios have been determined through the observedorbital curvature in the 3-year Hipparcos observation interval. Thefinal result is an observed `mass-luminosity relation' which falls closeto theoretical expectation, but with `outliers' due to undetectedmultiplicity or to composition- and age-effects in the nonuniformnear-star sample. Based in part on observations collected with the ESAHipparcos astrometry satellite. Tables~ 1, 3, 4 and 6 are also availablein electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr~(130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
Mesures d'etoiles doubles faites a Nice (5eme serie. Double star measurements made at Nice We present the last observations from two lists: General program and MLRpairs, made with the 50~cm refractor of Nice Observatory.
Binary star speckle measurements during 1989-1993 from the SAO 6 M and 1 M telescopes in Zelenchuk We have continued to survey visual and interferometric binary stars withsignificant orbital motion by means of speckle method at the telescopesof the Special Astrophysical Observatory (SAO) in Zelenchuk. Here wepresent the lists of 267 speckle observations made with the 6 m and the1 m telescopes in the period May 1989-November 1993.
Speckle Measurements of Binary Stars / 6-METER Telescope - 1987-1988 Not Available
A first catalogue of speckle-interferometric measurements of binary stars made with 6-m telescope of the USSR AS. Not Available
Speckle Interferometry Measurements of Binaries Using the 6-METER Telescope in 1986 Not Available
Mesures d'etoiles doubles a Meudon (3eme et derniere serie). Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976A&AS...23..205M&db_key=AST

Sottometti un nuovo articolo

Link relazionati

- Nessun link trovato -

Sottometti un nuovo link

Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:	Orsa Minore
Ascensione retta:	15^h25^m47.60^s
Declinazione:	+84Â°30'14.2"
Magnitudine apparente:	8.821
Distanza:	64.103 parsec
Moto proprio RA:	122.1
Moto proprio Dec:	-24.8
B-T magnitude:	9.797
V-T magnitude:	8.902

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 140625
TYCHO-2 2000	TYC 4638-1028-1
HIP	HIP 75529

→ Richiesta di ulteriori cataloghi da VizieR