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Proper Name	Zhang
Bayer Designation	Upsilon¹ Hydrae
Flamsteed Number	39 Hydrae
HR (BSC)	3903
HD	85444
Constellation	Hydra
Right Ascension	9h 51m 29s
Declination	-14° 50' 48"
Distance	264 light years 81 parsecs
Magnitude	Apparent: +4.1 Absolute: +0.9
Spectral Class	G6.5IIIa yellow giant
Optimum Visibility	February / March
Notes	Zhang is a yellow giant star some 17 times the Sun's diameter, known to have a brown dwarf, Upsilon¹ Hydrae b, in orbit around it. The name Zhang derives from the name of this star in Chinese tradition, in full Zhāng Xiù Yī, the 'first (star) of the Extended Net' (the Extended Net being a Chinese asterism within Hydra).

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