Markab - α Pegasi (alpha Pegasi)

Markab, also designated as α Pegasi (alpha Pegasi), is a variable main-sequence star in the constellation of Pegasus.

Markab visual magnitude is 2.49, making it the 91th brightest star in the sky. Thanks to its high brightness, Markab is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Markab:

Color of Markab ⬤

Magnitude of Markab 2.49

Class Main-sequence

VISIBILITY RIGHT NOW Markab - α Pegasi (alpha Pegasi) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of Markab

Markab 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 Markab are provided in the following table:

Right Ascension J2000 23h 04m 45s

Declination J2000 +15° 12’ 19”

Galactic Longitude 88.28°

Galactic Latitude -40.38°

Constellation Pegasus

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

Finder chart Markab - α Pegasi (alpha Pegasi) star

Simplified finder chart for Markab - α Pegasi (alpha Pegasi).

Visibility of Markab from your location

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

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

Azimuth: 74.8° RISE 4:13

Max altitude: 53.7° TRANSIT 11:30

Azimuth: 285.2° SET 18:48

RIGHT NOW Markab - α Pegasi (alpha Pegasi) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Markab

The image below is a photograph of Markab 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 Markab is 0.063 arcsec per year in Right Ascension and -0.042 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Markab - α Pegasi (alpha Pegasi) star

DSS2 image of Markab. The red arrow shows the motion of Markab during the next 10000 years (10.50 arcmin in Right Ascension and -7.00 arcmin in declination);

Distance of Markab from the Sun and relative movement

Markab is distant 139.55 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 42.81 pc

Distance (light year) 139.55 ly

Heliocentric radial velocity -4 km/s

Proper Motion RA 0.063 arcsec/year

Proper Motion Dec -0.042 arcsec/year

Spectral properties of Markab

Markab belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.67

Spectral Type B9V

Color Index (B-V) -0.04

Temperature of Markab 10653K

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

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

Alternative designations of Markab

Proper Name Markab

Bayer designation α Pegasi
(alpha Pegasi)

Flamsteed designation 54 Pegasi

Henry Draper Catalogue HD218045

SAO Catalogue SAO108378

Hipparcos Catalogue HIP113963

Durchmusterung Catalogue BD+14 4926

FK5 Catalogue 871

General Catalogue of Variable Stars 14417

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Other stars in Pegasus