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TYC 7998-847-1


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Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.

A survey of stars with composite spectra.
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Observation and Astrometry data

Constellation:Grue
Right ascension:22h00m32.07s
Declination:-42°27'06.5"
Apparent magnitude:7.267
Distance:220.264 parsecs
Proper motion RA:34.8
Proper motion Dec:-9.9
B-T magnitude:8.087
V-T magnitude:7.335

Catalogs and designations:
Proper Names   (Edit)
TYCHO-2 2000TYC 7998-847-1
USNO-A2.0USNO-A2 0450-40006606
HIPHIP 108639

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