Yellow-white giant · Gemini

Jishui

Also known as: ο Geminorum (ο Gem), HIP 37265

mag 4.9170 light-years

About

Jishui (ο Geminorum) is a yellow-white giant of magnitude 4.9 in Gemini, about 170 light-years away.

Jishui is in the constellation Gemini.
Best evenings: around early March it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from north of 45° S.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesNeeds a dark sky away from city lights.
Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.

Stars look the same in any instrument: brighter and sharper, but never bigger.

Proper name	Jishui
Designation	ο Geminorum (ο Gem)
Hipparcos number	HIP 37265
Type	Yellow-white giant
Spectral type	F3III
Colour	Yellowish whiteB−V colour index 0.41
Magnitude	4.9The smaller the number, the brighter.
Distance	170 light-yearsThe light you see left it around 1860.
Proper motion	0.12″ per year across the sky
Constellation	Gemini
Right ascension (J2000)	07h 39m 09.9s
Declination (J2000)	+34° 35′ 03″