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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:46  
clear_day Transit: 12:51  
SunsetSet: 18:55 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Taurus » 

121 Tauri

Altitude: 58.6°   Azimuth: 143.2°   Direction: South-East

121 Tauri is a variable sub-giant star in the constellation of Taurus.

121 Tauri visual magnitude is 5.38. Because of its reltive faintness, 121 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 121 Tauri:


121 Tauri is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 58.6°
Azimuth: 143.2°
Direction: South-East

Celestial coordinates and finder chart of 121 Tauri

121 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 121 Tauri are provided in the following table:

05h 35m 27s
+24° 02’ 21”

The simplified sky map below shows the position of 121 Tauri in the sky:

Finder chart 121 Tauri star
Simplified finder chart for 121 Tauri.

Visibility of 121 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 121 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: 66.0°
Max altitude: 62.6°
Azimuth: 294.0°

Digitized Sky Survey image of 121 Tauri

The image below is a photograph of 121 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 121 Tauri is 0.01 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 121 Tauri star
DSS2 image of 121 Tauri. The red arrow shows the motion of 121 Tauri during the next 10000 years (1.67 arcmin in Right Ascension and -4.00 arcmin in declination);

Distance of 121 Tauri from the Sun and relative movement

121 Tauri is distant 599.26 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

183.82 pc
599.26 ly
23 km/s
0.01 arcsec/year
-0.024 arcsec/year

Spectral properties of 121 Tauri

121 Tauri belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 121 Tauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 121 Tauri. Attribution: Richard Powell / CC BY-SA

Alternative designations of 121 Tauri