Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Pollux - β Geminorum (beta Geminorum)

Pollux, also designated as β Geminorum (beta Geminorum), is a variable and multiple hypergiant star in the constellation of Gemini.

Pollux visual magnitude is 1.14, making it the 16th brightest star in the sky. Thanks to its high brightness, Pollux 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 Pollux:

1.14
Hypergiant
Pollux - β Geminorum (beta Geminorum) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 4°.

Celestial coordinates and finder chart of Pollux

Pollux 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 Pollux are provided in the following table:

07h 45m 18s
+28° 01’ 33”
192.23°
23.41°
Gemini

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

Finder chart Pollux - β Geminorum (beta Geminorum) star
Simplified finder chart for Pollux - β Geminorum (beta Geminorum).

Visibility of Pollux from your location

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

Today's Pollux - β Geminorum (beta Geminorum) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 62.0°
Max altitude: 66.5°
Azimuth: 298.0°
Pollux - β Geminorum (beta Geminorum) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Pollux

The image below is a photograph of Pollux 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 Pollux is -0.628 arcsec per year in Right Ascension and -0.046 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Pollux - β Geminorum (beta Geminorum) star
DSS2 image of Pollux. The red arrow shows the motion of Pollux during the next 1000 years (-10.47 arcmin in Right Ascension and -0.77 arcmin in declination);

Distance of Pollux from the Sun and relative movement

Pollux is distant 33.70 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

10.34 pc
33.70 ly
3 km/s
-0.628 arcsec/year
-0.046 arcsec/year

Spectral properties of Pollux

Pollux belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

1.07
K0III
4743K

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

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

Pollux star system properties

Pollux 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 Pollux double sysyem:

1.14
11.34
10.2
201.1 arcsec

Alternative designations of Pollux

Pollux
β Geminorum
(beta Geminorum)
78 Geminorum
SAO79666
SAO79666