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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
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All Constellations » Pegasus » 

Matar - η Pegasi (eta Pegasi)

Altitude: 4.9°   Azimuth: 314.7°   Direction: North-West

Matar, also designated as η Pegasi (eta Pegasi), is a variable and multiple bright giant star in the constellation of Pegasus.

Matar visual magnitude is 2.94. Thanks to its high brightness, Matar 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 Matar:

Bright giant

Matar - η Pegasi (eta Pegasi) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 4.9°
Azimuth: 314.7°
Direction: North-West

Celestial coordinates and finder chart of Matar

Matar is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Matar are provided in the following table:

22h 43m 00s
+30° 13’ 17”

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

Finder chart Matar - η Pegasi (eta Pegasi) star
Simplified finder chart for Matar - η Pegasi (eta Pegasi).

Visibility of Matar 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 Matar - η Pegasi (eta 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: 59.8°
Max altitude: 68.7°
Azimuth: 300.2°

Digitized Sky Survey image of Matar

The image below is a photograph of Matar 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 Matar is 0.015 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Matar - η Pegasi (eta Pegasi) star
DSS2 image of Matar. The red arrow shows the motion of Matar during the next 10000 years (2.50 arcmin in Right Ascension and -4.17 arcmin in declination);

Distance of Matar from the Sun and relative movement

Matar is distant 214.76 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

65.88 pc
214.76 ly
4 km/s
0.015 arcsec/year
-0.025 arcsec/year

Spectral properties of Matar

Matar belongs to spectral class G2 and has a luminosity class of II corresponding to a bright giant star.


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

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

Matar star system properties

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

90.4 arcsec

Alternative designations of Matar

η Pegasi
(eta Pegasi)