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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Pegasus » 

Salm - τ Pegasi (tau Pegasi)

Altitude: -0.1°   Azimuth: 49.6°   Direction: North-East

Salm, also designated as τ Pegasi (tau Pegasi), is a variable main-sequence star in the constellation of Pegasus.

Salm visual magnitude is 4.6. Because of its moderate brightness, Salm 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 Salm:


Salm - τ Pegasi (tau Pegasi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -0.1°
Azimuth: 49.6°
Direction: North-East

Celestial coordinates and finder chart of Salm

Salm 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 Salm are provided in the following table:

23h 20m 38s
+23° 44’ 25”

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

Finder chart Salm - τ Pegasi (tau Pegasi) star
Simplified finder chart for Salm - τ Pegasi (tau Pegasi).

Visibility of Salm 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 Salm - τ Pegasi (tau 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: 66.3°
Max altitude: 62.3°
Azimuth: 293.7°

Digitized Sky Survey image of Salm

The image below is a photograph of Salm 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 Salm is 0.033 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Salm - τ Pegasi (tau Pegasi) star
DSS2 image of Salm. The red arrow shows the motion of Salm during the next 10000 years (5.50 arcmin in Right Ascension and -1.33 arcmin in declination);

Distance of Salm from the Sun and relative movement

Salm is distant 167.18 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

51.28 pc
167.18 ly
16 km/s
0.033 arcsec/year
-0.008 arcsec/year

Spectral properties of Salm

Salm belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.


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

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

Alternative designations of Salm

τ Pegasi
(tau Pegasi)