Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]

Helvetios - 51 Pegasi

Helvetios, also designated as 51 Pegasi , is a variable sub-giant star in the constellation of Pegasus.

Helvetios visual magnitude is 5.49. Because of its reltive faintness, Helvetios should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about Helvetios:

Helvetios - 51 Pegasi is above the horizon from Greenwich, United Kingdom [change]. Altitude: 29°.

Celestial coordinates and finder chart of Helvetios

Helvetios is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Helvetios are provided in the following table:

22h 57m 27s
+20° 46’ 08”

The simplified sky map below shows the position of Helvetios in the sky:

Finder chart Helvetios - 51 Pegasi star
Simplified finder chart for Helvetios - 51 Pegasi.

Visibility of Helvetios from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Helvetios - 51 Pegasi rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 69.2°
Max altitude: 59.3°
Azimuth: 290.8°
Helvetios - 51 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Helvetios

The image below is a photograph of Helvetios from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Helvetios is 0.204 arcsec per year in Right Ascension and 0.059 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Helvetios - 51 Pegasi star
DSS2 image of Helvetios. The red arrow shows the motion of Helvetios during the next 1000 years (3.40 arcmin in Right Ascension and 0.98 arcmin in declination);

Distance of Helvetios from the Sun and relative movement

Helvetios is distant 50.08 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

15.36 pc
50.08 ly
-31 km/s
0.204 arcsec/year
0.059 arcsec/year

Spectral properties of Helvetios

Helvetios belongs to spectral class G2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where Helvetios is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of Helvetios. Attribution: Richard Powell / CC BY-SA

Alternative designations of Helvetios