Yellow-white main-sequence star · Boötes

Alkalurops

Also known as: μ¹ Boötis (μ¹ Boo), HIP 75411

mag 4.3110 light-years

About

Alkalurops (μ¹ Boötis) is a yellow-white main-sequence star of magnitude 4.3 in Boötes, about 110 light-years away.

Alkalurops is in the constellation Boötes.
Best evenings: around late June 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 43° 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.

EyesVisible from the suburbs on a clear night, but lost in bright city skies.
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	Alkalurops
Designation	μ¹ Boötis (μ¹ Boo)
Hipparcos number	HIP 75411
Type	Yellow-white main-sequence star
Spectral type	F0V
Colour	Yellowish whiteB−V colour index 0.31
Magnitude	4.3The smaller the number, the brighter.
Distance	110 light-yearsThe light you see left it around 1910.
Proper motion	0.17″ per year across the sky
Constellation	Boötes
Right ascension (J2000)	15h 24m 29.4s
Declination (J2000)	+37° 22′ 38″

Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →