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HD 5515


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Spectral classification of stars with the same colours in intermediate multiband photometry - The concept of photometric 'star-box'
The concept of a photometric 'star box' is introduced for use with the UB V B1 B2 V1 G photometric system. Star boxes are employed to grouptogether all stars for which each photometric color differs by less thansome small quantity (in magnitude) from the corresponding color of agiven 'central' star. Probable causes of differences between the colorsof two stars are summarized, scatter in spectral type and luminosityclass within a single box is discussed, and the standard deviation ofnarrow-band photometric indices is calculated for stars grouped in thesame box. Dispersions in the UV and IR energy distributions of stars inthe same box are examined, and the results obtained in the seven-colorphotometric system for 113 stars are compared with the correspondingresults in a thirteen-color system. The classification of Am and Am:stars is briefly examined on the basis of star boxes.

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Osservazione e dati astrometrici

Costellazione:Pesci
Ascensione retta:00h57m18.23s
Declinazione:+25°17'33.4"
Magnitudine apparente:8.477
Distanza:60.024 parsec
Moto proprio RA:177.1
Moto proprio Dec:17.9
B-T magnitude:9.163
V-T magnitude:8.534

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 5515
TYCHO-2 2000TYC 1743-1788-1
USNO-A2.0USNO-A2 1125-00334778
HIPHIP 4471

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