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TYC 1393-2343-1


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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.

Photoelectric Observations in a Wide-Field Area around the Praesepe Cluster
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Photoelectric observations of lunar occultations. XII
Occultation observations of 414 events observed between 6 July 1979 and4 September 1980 with the 0.76-m telescope of McDonald Observatory arereported. Timings and data on double stars are given. Angular diameterinformation in six cases is included. The stars concerned with their runnumbers are: SAO 161754 (5270); 94027 (Alpha Tau) (5319, 5381, 5454);159370 (Gamma Lib) (5325, 5571); 162413 (43 Sgr) (5332); 97472 (3 Cnc)(5414); and 93955 (Theta Tau) (5445).

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Сазвежђа:Рак
Ректацензија:08h46m19.61s
Deклинација:+16°02'12.0"
Apparent магнитуда:8.73
Даљина:244.499 parsecs
Proper motion RA:-64.7
Proper motion Dec:-1.3
B-T magnitude:9.109
V-T magnitude:8.762

Каталог и designations:
Proper имена   (Edit)
TYCHO-2 2000TYC 1393-2343-1
USNO-A2.0USNO-A2 1050-05854408
HIPHIP 43058

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