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:

Color of σ2 Tauri ⬤

Magnitude of σ2 Tauri 4.69

Class Main-sequence

VISIBILITY RIGHT NOW

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:

Right Ascension J2000 04h 39m 16s

Declination J2000 +15° 55’ 05”

Galactic Longitude 181.99°

Galactic Latitude -19.97°

Constellation Taurus

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° RISE 16:15

Max altitude: 54.4° TRANSIT 23:37

Azimuth: 285.9° SET 7:02

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.

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.

Distance (parsec) 48.76 pc

Distance (light year) 158.95 ly

Heliocentric radial velocity 36 km/s

Proper Motion RA 0.083 arcsec/year

Proper Motion Dec -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.

Absolute magnitude 1.25

Spectral Type A5V

Color Index (B-V) 0.15

Temperature of σ2 Tauri 8571K

The red dot in the diagram below shows where σ2 Tauri is situated in the Hertzsprung–Russell 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:

Main star magnitude 4.69

Secondary star magnitude 5.09

Magnitude difference 0.4

Separation 431.2 arcsec

Alternative designations of σ2 Tauri

Bayer designation σ2 Tauri
(sigma2 Tauri)

Flamsteed designation 92 Tauri

Henry Draper Catalogue HD29488

SAO Catalogue SAO94054

Hipparcos Catalogue HIP21683

Durchmusterung Catalogue BD+15 666

FK5 Catalogue 2345

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