White main-sequence star · Aquila

Okab

Also known as: ζ Aquilae (ζ Aql), HIP 93747

mag 3.083 light-years

About

Okab (ζ Aquilae) is a white main-sequence star of magnitude 3.0 in Aquila, about 83 light-years away.

Okab is in the constellation Aquila.
Best evenings: around late August 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 66° 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.

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	Okab
Designation	ζ Aquilae (ζ Aql)
Hipparcos number	HIP 93747
Type	White main-sequence star
Spectral type	A0Vn
Colour	WhiteB−V colour index 0.01
Magnitude	3.0The smaller the number, the brighter.
Distance	83 light-yearsThe light you see left it around 1943.
Proper motion	0.096″ per year across the sky
Constellation	Aquila
Right ascension (J2000)	19h 05m 24.6s
Declination (J2000)	+13° 51′ 49″