13 Pegasi

Altitude: 8.1° Azimuth: 72.4° Direction: East-North-East

13 Pegasi is a variable and double giant star in the constellation of Pegasus.

13 Pegasi visual magnitude is 5.29. Because of its reltive faintness, 13 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 13 Pegasi:

Color of 13 Pegasi ⬤

Magnitude of 13 Pegasi 5.29

Class Giant

VISIBILITY RIGHT NOW

13 Pegasi is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 8.1°
Azimuth: 72.4°
Direction: East-North-East

Celestial coordinates and finder chart of 13 Pegasi

13 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 13 Pegasi are provided in the following table:

Right Ascension J2000 21h 50m 08s

Declination J2000 +17° 17’ 08”

Galactic Longitude 72.97°

Galactic Latitude -27.52°

Constellation Pegasus

The simplified sky map below shows the position of 13 Pegasi in the sky:

Simplified finder chart for 13 Pegasi.

Visibility of 13 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 13 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: 72.7° RISE 14:47

Max altitude: 55.8° TRANSIT 22:16

Azimuth: 287.3° SET 5:50

Digitized Sky Survey image of 13 Pegasi

The image below is a photograph of 13 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 13 Pegasi is 0.076 arcsec per year in Right Ascension and -0.061 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 13 Pegasi. The red arrow shows the motion of 13 Pegasi during the next 10000 years (12.67 arcmin in Right Ascension and -10.17 arcmin in declination);

Distance of 13 Pegasi from the Sun and relative movement

13 Pegasi is distant 108.99 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 33.43 pc

Distance (light year) 108.99 ly

Heliocentric radial velocity -4 km/s

Proper Motion RA 0.076 arcsec/year

Proper Motion Dec -0.061 arcsec/year

Spectral properties of 13 Pegasi

13 Pegasi belongs to spectral class F2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 2.67

Spectral Type F2III

Color Index (B-V) 0.37

Temperature of 13 Pegasi 7044K

The red dot in the diagram below shows where 13 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 13 Pegasi. Attribution: Richard Powell / CC BY-SA

13 Pegasi star system properties

13 Pegasi is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 13 Pegasi double sysyem:

Main star magnitude 5.29

Secondary star magnitude 7.29

Magnitude difference 2

Separation 0.2 arcsec

Alternative designations of 13 Pegasi

Flamsteed designation 13 Pegasi

Henry Draper Catalogue HD207652

SAO Catalogue SAO107425

Hipparcos Catalogue HIP107788

Durchmusterung Catalogue BD+16 4612

General Catalogue of Variable Stars 13891

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In Evidence

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