40 Pegasi

40 Pegasi is a double bright giant star in the constellation of Pegasus.

40 Pegasi visual magnitude is 5.82. Because of its reltive faintness, 40 Pegasi 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 40 Pegasi:

Color of 40 Pegasi ⬤

Magnitude of 40 Pegasi 5.82

Class Bright giant

VISIBILITY RIGHT NOW 40 Pegasi is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 40 Pegasi

40 Pegasi 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 40 Pegasi are provided in the following table:

Right Ascension J2000 22h 38m 52s

Declination J2000 +19° 31’ 19”

Galactic Longitude 84.84°

Galactic Latitude -33.37°

Constellation Pegasus

The simplified sky map below shows the position of 40 Pegasi in the sky:

Simplified finder chart for 40 Pegasi.

Visibility of 40 Pegasi from your location

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

Today's 40 Pegasi rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 70.5° RISE 23:17

Max altitude: 58.0° TRANSIT 7:04

Azimuth: 289.5° SET 14:48

RIGHT NOW 40 Pegasi is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 40 Pegasi

The image below is a photograph of 40 Pegasi 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 40 Pegasi is -0.042 arcsec per year in Right Ascension and -0.099 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 40 Pegasi. The red arrow shows the motion of 40 Pegasi during the next 1000 years (-0.70 arcmin in Right Ascension and -1.65 arcmin in declination);

Distance of 40 Pegasi from the Sun and relative movement

40 Pegasi is distant 381.29 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

Distance (parsec) 116.96 pc

Distance (light year) 381.29 ly

Heliocentric radial velocity -20 km/s

Proper Motion RA -0.042 arcsec/year

Proper Motion Dec -0.099 arcsec/year

Spectral properties of 40 Pegasi

40 Pegasi belongs to spectral class G8 and has a luminosity class of II corresponding to a bright giant star.

Absolute magnitude 0.48

Spectral Type G8II

Color Index (B-V) 0.92

Temperature of 40 Pegasi 4943K

The red dot in the diagram below shows where 40 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 40 Pegasi. Attribution: Richard Powell / CC BY-SA

40 Pegasi star system properties

40 Pegasi is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the 40 Pegasi double sysyem:

Main star magnitude 5.82

Secondary star magnitude 11.42

Magnitude difference 5.6

Separation 1.5 arcsec

Alternative designations of 40 Pegasi

Flamsteed designation 40 Pegasi

Henry Draper Catalogue HD214567

SAO Catalogue SAO108064

Hipparcos Catalogue HIP111810

Durchmusterung Catalogue BD+18 5014

In Evidence

Other stars in Pegasus