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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
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Scorpius » 

1 Scorpii

Altitude: -61.7°   Azimuth: 329.4°   Direction: North-North-West

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

1 Scorpii visual magnitude is 4.64. Because of its moderate brightness, 1 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 proper motion of 1 Scorpii is -0.018 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 1 Scorpii star
DSS2 image of 1 Scorpii. The red arrow shows the motion of 1 Scorpii during the next 10000 years (-3.00 arcmin in Right Ascension and -4.00 arcmin in declination);

Key facts about 1 Scorpii


1 Scorpii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -61.7°
Azimuth: 329.4°
Direction: North-North-West

Celestial coordinates and finder chart of 1 Scorpii

1 Scorpii 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 1 Scorpii are provided in the following table:

15h 50m 58s
-25° 45’ 05”

The simplified sky map below shows the position of 1 Scorpii in the sky:

Finder chart 1 Scorpii star
Simplified finder chart for 1 Scorpii.

Visibility of 1 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 1 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: 115.8°
Max altitude: 12.8°
Azimuth: 244.2°

Distance of 1 Scorpii from the Sun and relative movement

1 Scorpii is distant 521.60 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

160.00 pc
521.60 ly
3 km/s
-0.018 arcsec/year
-0.024 arcsec/year

Spectral properties of 1 Scorpii

1 Scorpii belongs to spectral class B3 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 1 Scorpii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 1 Scorpii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 1 Scorpii