Acrab - β1 Scorpii (beta1 Scorpii)
Acrab, also designated as β1 Scorpii (beta1 Scorpii), is a variable and multiple main-sequence star in the constellation of Scorpius.
Acrab visual magnitude is 2.62. Thanks to its high brightness, Acrab 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 Acrab:
Celestial coordinates and finder chart of Acrab
Acrab 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 Acrab are provided in the following table:
The simplified sky map below shows the position of Acrab in the sky:
Visibility of Acrab from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Today's Acrab - β1 Scorpii (beta1 Scorpii) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):
Digitized Sky Survey image of Acrab
The image below is a photograph of Acrab 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 Acrab is -0.006 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of Acrab from the Sun and relative movement
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.
Spectral properties of Acrab
Acrab 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 Acrab is situated in the Hertzsprung–Russell diagram.
Acrab 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: