ο Tauri (omicron Tauri)

ο Tauri is a variable giant star in the constellation of Taurus.

ο Tauri visual magnitude is 3.6. Because of its moderate brightness, ο 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 ο Tauri:

Color of ο Tauri ⬤

Magnitude of ο Tauri 3.6

Class Giant

VISIBILITY RIGHT NOW ο Tauri (omicron Tauri) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of ο Tauri

ο 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 ο Tauri are provided in the following table:

Right Ascension J2000 03h 24m 48s

Declination J2000 +09° 01’ 44”

Galactic Longitude 174.12°

Galactic Latitude -38.16°

Constellation Taurus

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

Finder chart ο Tauri (omicron Tauri) star

Simplified finder chart for ο Tauri (omicron Tauri).

Visibility of ο Tauri from your location

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

Today's ο Tauri (omicron Tauri) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.0° RISE 9:06

Max altitude: 47.5° TRANSIT 15:49

Azimuth: 279.0° SET 22:33

RIGHT NOW ο Tauri (omicron Tauri) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ο Tauri

The image below is a photograph of ο 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 ο Tauri is -0.066 arcsec per year in Right Ascension and -0.078 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of ο Tauri. The red arrow shows the motion of ο Tauri during the next 10000 years (-11.00 arcmin in Right Ascension and -13.00 arcmin in declination);

Distance of ο Tauri from the Sun and relative movement

ο Tauri is distant 211.41 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 64.85 pc

Distance (light year) 211.41 ly

Heliocentric radial velocity -21 km/s

Proper Motion RA -0.066 arcsec/year

Proper Motion Dec -0.078 arcsec/year

Spectral properties of ο Tauri

ο Tauri belongs to spectral class G6 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.46

Spectral Type G6III

Color Index (B-V) 0.89

Temperature of ο Tauri 5023K

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

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

Alternative designations of ο Tauri

Bayer designation ο Tauri
(omicron Tauri)

Flamsteed designation 1 Tauri

Henry Draper Catalogue HD21120

SAO Catalogue SAO111172

Hipparcos Catalogue HIP15900

Durchmusterung Catalogue BD+08 511

FK5 Catalogue 121

General Catalogue of Variable Stars 1134

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