Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:44  
clear_day Transit: 12:57  
SunsetSet: 21:11 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Taurus » 

139 Tauri

Altitude: -12.4°   Azimuth: 4.9°   Direction: North

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

139 Tauri visual magnitude is 4.82. Because of its moderate brightness, 139 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 139 Tauri:


139 Tauri is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -12.4°
Azimuth: 4.9°
Direction: North

Celestial coordinates and finder chart of 139 Tauri

139 Tauri 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 139 Tauri are provided in the following table:

05h 57m 59s
+25° 57’ 14”

The simplified sky map below shows the position of 139 Tauri in the sky:

Finder chart 139 Tauri star
Simplified finder chart for 139 Tauri.

Visibility of 139 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 139 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: 64.0°
Max altitude: 64.5°
Azimuth: 296.0°
139 Tauri is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 139 Tauri

The image below is a photograph of 139 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 139 Tauri is 0 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 139 Tauri star
DSS2 image of 139 Tauri. The red arrow shows the motion of 139 Tauri during the next 100000 years (0.00 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of 139 Tauri from the Sun and relative movement

139 Tauri is distant 2,103.23 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

645.16 pc
2,103.23 ly
8 km/s
-0.002 arcsec/year

Spectral properties of 139 Tauri

139 Tauri belongs to spectral class B0 and has a luminosity class of II corresponding to a hypergiant star.


The red dot in the diagram below shows where 139 Tauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 139 Tauri. Attribution: Richard Powell / CC BY-SA

Alternative designations of 139 Tauri