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: 6:44  
clear_day Transit: 12:51  
SunsetSet: 18:57 south
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All Constellations » Scorpius » 

ω1 Scorpii (omega1 Scorpii)

Altitude: -11.4°   Azimuth: 251.0°   Direction: West-South-West

ω1 Scorpii is a main-sequence star in the constellation of Scorpius.

ω1 Scorpii visual magnitude is 3.96. Because of its moderate brightness, ω1 Scorpii 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 ω1 Scorpii:


ω1 Scorpii (omega1 Scorpii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -11.4°
Azimuth: 251.0°
Direction: West-South-West

Celestial coordinates and finder chart of ω1 Scorpii

ω1 Scorpii 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 ω1 Scorpii are provided in the following table:

16h 06m 48s
-20° 40’ 09”

The simplified sky map below shows the position of ω1 Scorpii in the sky:

Finder chart ω1 Scorpii (omega1 Scorpii) star
Simplified finder chart for ω1 Scorpii (omega1 Scorpii).

Visibility of ω1 Scorpii 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 ω1 Scorpii (omega1 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: 110.7°
Max altitude: 17.9°
Azimuth: 249.3°

Digitized Sky Survey image of ω1 Scorpii

The image below is a photograph of ω1 Scorpii 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 ω1 Scorpii is -0.009 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ω1 Scorpii (omega1 Scorpii) star
DSS2 image of ω1 Scorpii. The red arrow shows the motion of ω1 Scorpii during the next 10000 years (-1.50 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of ω1 Scorpii from the Sun and relative movement

ω1 Scorpii is distant 423.38 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

129.87 pc
423.38 ly
-3 km/s
-0.009 arcsec/year
-0.021 arcsec/year

Spectral properties of ω1 Scorpii

ω1 Scorpii belongs to spectral class B1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where ω1 Scorpii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ω1 Scorpii. Attribution: Richard Powell / CC BY-SA

Alternative designations of ω1 Scorpii

ω1 Scorpii
(omega1 Scorpii)