Blue-white subgiant · Scorpius

Lesath

Also known as: υ Scorpii (υ Sco), HIP 85696

mag 2.7580 light-years

About

Lesath (υ Scorpii) is a blue-white subgiant of magnitude 2.7 in Scorpius, about 580 light-years away.

Lesath is in the constellation Scorpius.
Best evenings: around late July 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 south of 43° N.

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.

EyesEasy, even from town.
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	Lesath
Designation	υ Scorpii (υ Sco)
Hipparcos number	HIP 85696
Type	Blue-white subgiant
Spectral type	B2IV
Colour	Blue-whiteB−V colour index −0.18
Magnitude	2.7The smaller the number, the brighter.
Distance	580 light-yearsThe light you see left it around 1450.
Proper motion	0.029″ per year across the sky
Constellation	Scorpius
Right ascension (J2000)	17h 30m 45.8s
Declination (J2000)	−37° 17′ 45″