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HD 168910


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Photometry of hydrogen deficient stars.
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Four-colour photometry of hydrogen-deficient stars and related objects
Stromgren uvby photometry of hydrogen deficient and helium-weak starssuggests that the 'extreme helium' (= 'hydrogen deficient') stars whichhave been well observed are all variable, probably in a complex way.Previously observed short-term variability of HD 160641 and long-termvariability of HD 168476 are confirmed. There is no evidence forvariability in the intermediate helium stars or the helium-weak stars.

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Observation and Astrometry data

Constellation:Télescope
Right ascension:18h25m13.20s
Declination:-54°38'20.8"
Apparent magnitude:9.142
Proper motion RA:-3.8
Proper motion Dec:-12.3
B-T magnitude:9.532
V-T magnitude:9.175

Catalogs and designations:
Proper Names
HD 1989HD 168910
TYCHO-2 2000TYC 8748-1158-1
USNO-A2.0USNO-A2 0300-34225216
HIPHIP 90277
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