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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
sunny   (Daytime)   What's Visible Now?
All Constellations » Scorpius » 

Acrab - β1 Scorpii (beta1 Scorpii)

Below the horizon.  Rise: 17:03 | Tran: 21:14 | Set: 1:28
Alt: -32.53°   Az: 81.14°   Direction: East

Acrab, also designated as β1 Scorpii (beta1 Scorpii), is a variable and multiple main-sequence star of spectral class B1 in the constellation of Scorpius.

Acrab visual magnitude is 2.62. Because of its brightness, Acrab is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Acrab - β1 Scorpii (beta1 Scorpii) star
DSS2 image of Acrab. The red arrow shows the motion of Acrab during the next 10000 years (-1.00 arcmin in Right Ascension and -3.17 arcmin in declination);

Celestial Coordinates

Apparent

16h 06m 52s
-19° 52’ 14”
16h 09m 23s
08h 16m 15s

J2000

16h 05m 26s
-19° 48’ 20”

Galactic Coordinates

353.19°
23.6°

Finder Chart

Finder chart Acrab - β1 Scorpii (beta1 Scorpii) star
Simplified finder chart for Acrab - β1 Scorpii (beta1 Scorpii).

Magnitude, Color, Spectral Class

2.62
Main-sequence

-3.44
B1V
11092K

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

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

Star System Properties

Acrab is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Acrab double sysyem:

2.62
3.92
1.3
0 arcsec

Distance, Radial Speed, Proper Motion

Acrab is distant 530.08 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

162.60
530.08
-1 km/s
-0.006 arcsec/y
-0.019"/y

Alternative Designations

Acrab
β1 Scorpii
(beta1 Scorpii)
SAO159682
SAO159682

Visibility from Your Location

Today's Acrab - β1 Scorpii (beta1 Scorpii) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.9°
Max altitude: 18.6°
Azimuth: 250.1°