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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
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All Constellations » Scorpius » 

Lesath - υ Scorpii (upsilon Scorpii)

Altitude: -3.4°   Azimuth: 205.8°   Direction: South-South-West

Lesath, also designated as υ Scorpii (upsilon Scorpii), is a sub-giant star in the constellation of Scorpius.

Lesath visual magnitude is 2.69. Thanks to its high brightness, Lesath is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Lesath:


Lesath - υ Scorpii (upsilon Scorpii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -3.4°
Azimuth: 205.8°
Direction: South-South-West

Celestial coordinates and finder chart of Lesath

Lesath is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Lesath are provided in the following table:

17h 30m 45s
-37° 17’ 44”

The simplified sky map below shows the position of Lesath in the sky:

Finder chart Lesath - υ Scorpii (upsilon Scorpii) star
Simplified finder chart for Lesath - υ Scorpii (upsilon Scorpii).

Visibility of Lesath 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 Lesath - υ Scorpii (upsilon Scorpii) 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: 127.3°
Max altitude: 1.2°
Azimuth: 232.7°

Digitized Sky Survey image of Lesath

The image below is a photograph of Lesath 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 Lesath is -0.001 arcsec per year in Right Ascension and -0.031 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Lesath - υ Scorpii (upsilon Scorpii) star
DSS2 image of Lesath. The red arrow shows the motion of Lesath during the next 10000 years (-0.17 arcmin in Right Ascension and -5.17 arcmin in declination);

Distance of Lesath from the Sun and relative movement

Lesath is distant 518.28 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

158.98 pc
518.28 ly
8 km/s
-0.001 arcsec/year
-0.031 arcsec/year

Spectral properties of Lesath

Lesath 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 Lesath is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of Lesath

υ Scorpii
(upsilon Scorpii)