Cebalrai - β Ophiuchi (beta Ophiuchi)
Cebalrai, also designated as β Ophiuchi (beta Ophiuchi), is a giant star in the constellation of Ophiuchus.
Cebalrai visual magnitude is 2.77. Thanks to its high brightness, Cebalrai 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 Cebalrai:
Celestial coordinates and finder chart of Cebalrai
Cebalrai 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 Cebalrai are provided in the following table:
The simplified sky map below shows the position of Cebalrai in the sky:
Visibility of Cebalrai from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Today's Cebalrai - β Ophiuchi (beta Ophiuchi) 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 Cebalrai
The image below is a photograph of Cebalrai 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 Cebalrai is -0.04 arcsec per year in Right Ascension and 0.159 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of Cebalrai from the Sun and relative movement
Cebalrai is distant 81.95 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.
Spectral properties of Cebalrai
Cebalrai belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where Cebalrai is situated in the Hertzsprung–Russell diagram.