Yellow main-sequence star · Pegasus

Helvetios

Also known as: 51 Pegasi (51 Peg), HIP 113357

mag 5.551 light-years

About

Helvetios (51 Pegasi) is a yellow main-sequence star of magnitude 5.5 in Pegasus, about 51 light-years away.

Helvetios is in the constellation Pegasus.
Best evenings: around mid-October 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 59° 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	Helvetios
Designation	51 Pegasi (51 Peg)
Hipparcos number	HIP 113357
Type	Yellow main-sequence star
Spectral type	G5V
Colour	YellowB−V colour index 0.67
Magnitude	5.5The smaller the number, the brighter.
Distance	51 light-yearsThe light you see left it around 1975.
Proper motion	0.22″ per year across the sky
Constellation	Pegasus
Right ascension (J2000)	22h 57m 28.0s
Declination (J2000)	+20° 46′ 08″