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HR 999

BSC 999, HD 20644

Orange giant in Aries

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Proper Name	None
Bayer Designation	None
Flamsteed Number	None
HR (BSC)	999
HD	20644
Constellation	Aries
Right Ascension	3h 20m 20s
Declination	+29° 2' 54"
Distance	543 light years 166 parsecs
Magnitude	Apparent: +4.46 Absolute: -1.65
Spectral Class	K3IIIaBa0.5 orange giant
Optimum Visibility	November / December
Notes	HR 999 or HD 20644 is fourth-magnitude star in the northeastern parts of the constellation Aries. The primary star is an evolved orange giant, whose spectrum shows relatively high levels of barium in its atmosphere. This unusual chemistry may imply the existence of an otherwise undetected white dwarf companion as a source for the high metallicity of the giant star.

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