4 Tauri

4 Tauri is a hypergiant star in the constellation of Taurus.

4 Tauri visual magnitude is 5.14. Because of its reltive faintness, 4 Tauri should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 4 Tauri:

Color of 4 Tauri ⬤

Magnitude of 4 Tauri 5.14

Class Hypergiant

VISIBILITY RIGHT NOW 4 Tauri is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 4 Tauri

4 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 4 Tauri are provided in the following table:

Right Ascension J2000 03h 30m 24s

Declination J2000 +11° 20’ 11”

Galactic Longitude 173.32°

Galactic Latitude -35.55°

Constellation Taurus

The simplified sky map below shows the position of 4 Tauri in the sky:

Simplified finder chart for 4 Tauri.

Visibility of 4 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 4 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: 78.7° RISE 4:55

Max altitude: 49.9° TRANSIT 11:51

Azimuth: 281.3° SET 18:47

RIGHT NOW 4 Tauri is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 4 Tauri

The image below is a photograph of 4 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 4 Tauri is -0.008 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 4 Tauri. The red arrow shows the motion of 4 Tauri during the next 10000 years (-1.33 arcmin in Right Ascension and -3.00 arcmin in declination);

Distance of 4 Tauri from the Sun and relative movement

4 Tauri is distant 416.88 light years from the Sun

Distance (parsec) 127.88 pc

Distance (light year) 416.88 ly

Proper Motion RA -0.008 arcsec/year

Proper Motion Dec -0.018 arcsec/year

Spectral properties of 4 Tauri

4 Tauri belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude -0.39

Spectral Type A0V

Color Index (B-V) -0.03

Temperature of 4 Tauri 10516K

The red dot in the diagram below shows where 4 Tauri is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 4 Tauri. Attribution: Richard Powell / CC BY-SA

Alternative designations of 4 Tauri

Flamsteed designation 4 Tauri

Henry Draper Catalogue HD21686

SAO Catalogue SAO93463

Hipparcos Catalogue HIP16322

Durchmusterung Catalogue BD+10 452

In Evidence

Other stars in Taurus