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HD 138425 (Isabelle Da Fonseca)


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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 catalogue of four-color photometry of late F-type stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969AJ.....74..705P&db_key=AST

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Observation and Astrometry data

Constellation:Libra
Right ascension:15h32m17.87s
Declination:-10°26'19.5"
Apparent magnitude:6.588
Distance:127.065 parsecs
Proper motion RA:9.7
Proper motion Dec:-48.1
B-T magnitude:7.68
V-T magnitude:6.679

Catalogs and designations:
Proper NamesIsabelle Da Fonseca
  (Edit)
HD 1989HD 138425
TYCHO-2 2000TYC 5599-956-1
USNO-A2.0USNO-A2 0750-09020479
HIPHIP 76079

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