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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Taurus » 

σ2 Tauri (sigma2 Tauri)

Altitude: 43.4°   Azimuth: 125.5°   Direction: South-East

σ2 Tauri is a multiple main-sequence star in the constellation of Taurus.

σ2 Tauri visual magnitude is 4.69. Because of its moderate brightness, σ2 Tauri 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 σ2 Tauri:


σ2 Tauri (sigma2 Tauri) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 43.4°
Azimuth: 125.5°
Direction: South-East

Celestial coordinates and finder chart of σ2 Tauri

σ2 Tauri 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 σ2 Tauri are provided in the following table:

04h 39m 16s
+15° 55’ 05”

The simplified sky map below shows the position of σ2 Tauri in the sky:

Finder chart σ2 Tauri (sigma2 Tauri) star
Simplified finder chart for σ2 Tauri (sigma2 Tauri).

Visibility of σ2 Tauri 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 σ2 Tauri (sigma2 Tauri) 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: 74.1°
Max altitude: 54.4°
Azimuth: 285.9°

Digitized Sky Survey image of σ2 Tauri

The image below is a photograph of σ2 Tauri 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 σ2 Tauri is 0.083 arcsec per year in Right Ascension and -0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of σ2 Tauri (sigma2 Tauri) star
DSS2 image of σ2 Tauri. The red arrow shows the motion of σ2 Tauri during the next 10000 years (13.83 arcmin in Right Ascension and -3.00 arcmin in declination);

Distance of σ2 Tauri from the Sun and relative movement

σ2 Tauri is distant 158.95 light years from the Sun and it is moving far from the Sun at the speed of 36 kilometers per second.

48.76 pc
158.95 ly
36 km/s
0.083 arcsec/year
-0.018 arcsec/year

Spectral properties of σ2 Tauri

σ2 Tauri 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 σ2 Tauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of σ2 Tauri. Attribution: Richard Powell / CC BY-SA

σ2 Tauri star system properties

σ2 Tauri is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the σ2 Tauri double sysyem:

431.2 arcsec

Alternative designations of σ2 Tauri

σ2 Tauri
(sigma2 Tauri)