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HD 223959


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מאמרים קשורים

New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.

Photoelectric photometry of stars in the Vilnius system in Kapteyn areas SA 2, 4 and 6
Photoelectric photometry in the Vilnius system of 114 standard stars inKapteyn areas SA 2, 4, and 6 is presented with mean square errors of thearithmetic mean +/- 0.005 mag. Photometrically determined spectral typesand luminosity classes of the stars are also presented.

H-beta photometry of northern intermediate galactic latitude early-type stars and galactic structure away from the plane
Photoelectric H-beta photometry is presented for 255 early-type stars atintermediate galactic latitudes. Absolute magnitudes and distances arederived for the more luminous stars. Those with visual magnitudes lessthan or equal to 2.5 and at distances of up to 1 kpc from the galacticplane may follow the spiral structure in the plane.

UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1977MNRAS.180..691H&db_key=AST

Observations of the Spatial Structure of Interstellar Hydrogen. II. Optical Determination of Distances in a Small Region
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970ApJ...160...59A&db_key=AST

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משמש של הקבוצה הבאה

תצפית ומידע אסטרומטרי

קבוצת-כוכבים:קפיאוס
התרוממות ימנית:23h53m41.05s
סירוב:+76°34'57.4"
גודל גלוי:8.423
מרחק:729.927 פארסק
תנועה נכונה:-2.3
תנועה נכונה:-1.1
B-T magnitude:8.518
V-T magnitude:8.431

קטלוגים וכינוים:
שם עצם פרטי   (Edit)
HD 1989HD 223959
TYCHO-2 2000TYC 4602-1438-1
USNO-A2.0USNO-A2 1650-02877656
HIPHIP 117819
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