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HD 19622


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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.

Spectral types for early-type stars observed by SKYLAB
MK spectral types are presented for 246 early-type stars observed withthe S-019 ultraviolet stellar astronomy experiment on Skylab. K-linetypes are also given where applicable, and various peculiar stars areidentified. The peculiar stars include five silicon stars, a shell star,a helium-rich star, a silicon-strontium star, a chromium-europium star,and two marginal metallic-line stars.

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Observation and Astrometry data

Constellation:Éridan
Right ascension:03h08m54.19s
Declination:-18°58'09.2"
Apparent magnitude:7.186
Distance:277.778 parsecs
Proper motion RA:14.2
Proper motion Dec:5.4
B-T magnitude:7.249
V-T magnitude:7.192

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 19622
TYCHO-2 2000TYC 5868-1132-1
USNO-A2.0USNO-A2 0675-01079043
HIPHIP 14627

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