55 Pegasi

55 Pegasi is a variable giant star in the constellation of Pegasus.

55 Pegasi visual magnitude is 4.52. Because of its moderate brightness, 55 Pegasi should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 55 Pegasi:

Color of 55 Pegasi ⬤

Magnitude of 55 Pegasi 4.52

Class Giant

VISIBILITY RIGHT NOW 55 Pegasi is above the horizon from Greenwich, United Kingdom [change]. Altitude: 1°.

Celestial coordinates and finder chart of 55 Pegasi

55 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 55 Pegasi are provided in the following table:

Right Ascension J2000 23h 07m 00s

Declination J2000 +09° 24’ 33”

Galactic Longitude 84.62°

Galactic Latitude -45.55°

Constellation Pegasus

The simplified sky map below shows the position of 55 Pegasi in the sky:

Simplified finder chart for 55 Pegasi.

Visibility of 55 Pegasi from your location

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

Today's 55 Pegasi rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 80.6° RISE 4:54

Max altitude: 47.9° TRANSIT 11:40

Azimuth: 279.4° SET 18:26

RIGHT NOW 55 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 55 Pegasi

The image below is a photograph of 55 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 55 Pegasi is 0.011 arcsec per year in Right Ascension and -0.014 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 55 Pegasi. The red arrow shows the motion of 55 Pegasi during the next 10000 years (1.83 arcmin in Right Ascension and -2.33 arcmin in declination);

Distance of 55 Pegasi from the Sun and relative movement

55 Pegasi is distant 321.82 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 98.72 pc

Distance (light year) 321.82 ly

Heliocentric radial velocity -5 km/s

Proper Motion RA 0.011 arcsec/year

Proper Motion Dec -0.014 arcsec/year

Spectral properties of 55 Pegasi

55 Pegasi belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.45

Spectral Type M1III

Color Index (B-V) 1.57

Temperature of 55 Pegasi 3691K

The red dot in the diagram below shows where 55 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 55 Pegasi. Attribution: Richard Powell / CC BY-SA

Alternative designations of 55 Pegasi

Flamsteed designation 55 Pegasi

Henry Draper Catalogue HD218329

SAO Catalogue SAO127976

Hipparcos Catalogue HIP114144

Durchmusterung Catalogue BD+08 4997

FK5 Catalogue 1603

General Catalogue of Variable Stars 14428

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Other stars in Pegasus