Your guide to the Solar System and the night sky
By donating now you help keep this site alive and free from ads. Please consider supporting this project.
🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:48  ☀️ Transit: 13:04  🌅 Sunset: 19:21

Antares - α Scorpii (alpha Scorpii)

Antares, also designated as α Scorpii (alpha Scorpii), is a variable and double supergiant star in the constellation of Scorpius.

Antares visual magnitude is 0.96, making it the 14th brightest star in the sky. Thanks to its high brightness, Antares 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 Antares:

Antares - α Scorpii (alpha Scorpii) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of Antares

Antares is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Antares are provided in the following table:

16h 29m 24s
-26° 25’ 54”

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

Finder chart Antares - α Scorpii (alpha Scorpii) star
Simplified finder chart for Antares - α Scorpii (alpha Scorpii).

Visibility of Antares from your location

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

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

Azimuth: 116.4°
Max altitude: 12.1°
Azimuth: 243.6°
Antares - α Scorpii (alpha Scorpii) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Antares

The image below is a photograph of Antares 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 Antares is -0.01 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Antares - α Scorpii (alpha Scorpii) star
DSS2 image of Antares. The red arrow shows the motion of Antares during the next 10000 years (-1.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of Antares from the Sun and relative movement

Antares is distant 603.70 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

185.19 pc
603.70 ly
-3 km/s
-0.01 arcsec/year
-0.02 arcsec/year

Spectral properties of Antares

Antares belongs to spectral class M1 and has a luminosity class of I corresponding to a supergiant star.


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

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

Antares star system properties

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

2.9 arcsec

Alternative designations of Antares

α Scorpii
(alpha Scorpii)