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HD 48143 (Nashville John Willem Ellen)


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מאמרים קשורים

Stroemgren photometry of F- and G-type stars brighter than V = 9.6. I. UVBY photometry
Within the framework of a large photometric observing program, designedto investigate the Galaxy's structure and evolution, Hβ photometryis being made for about 9000 stars. As a by-product, supplementary uvbyphotometry has been made. The results are presented in a cataloguecontaining 6924 uvby observations of 6190 stars, all south ofδ=+38deg. The overall internal rms errors of one observation(transformed to the standard system) of a program star in the interval6.5

Estimation of spectral classifications for bright northern stars with interesting Stromgren indices
The purpose of this investigation is to provide spectroscopic observerswith finding lists of potentially interesting objects. From anunpublished UVBY catalogue of 7026 northern stars (mostly brighter than8.3m) 1094 objects with interesting combinations of UVBY indices havebeen selected. Most stars with post-HD classifications have beenexcluded, as well as late F dwarfs belonging to the intermediatepopulation II. For the 792 remaining stars estimated spectralclassifications are given. The techniques and experience from a previouspaper dealing with southern stars have been utilized here. Among thepredicted spectral classifications are 40 OB stars; 262 Ap, Am, or Fmstars; 16 supergiants of types A to G; 110 bright giants of types A to K(class II); 156 double stars or objects with composite spectra; 26 lateF dwarfs; 91 weak-lined dwarf and giant stars of types F to K, includingearly F-type population II field blue stragglers; and a few possiblefield horizontal branch stars, lambda Bootis-type stars, and late-typehalo giants.

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תצפית ומידע אסטרומטרי

קבוצת-כוכבים:תאומים
התרוממות ימנית:06h42m53.98s
סירוב:+23°12'49.8"
גודל גלוי:7.841
מרחק:552.486 פארסק
תנועה נכונה:-1.8
תנועה נכונה:-7
B-T magnitude:8.654
V-T magnitude:7.909

קטלוגים וכינוים:
שם עצם פרטיNashville John Willem Ellen
  (Edit)
HD 1989HD 48143
TYCHO-2 2000TYC 1893-1614-1
USNO-A2.0USNO-A2 1125-04413665
HIPHIP 32157

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