20 Ophiuchi is a sub-giant star in the constellation of Ophiuchus.
20 Ophiuchi visual magnitude is 4.65. Because of its moderate brightness, 20 Ophiuchi 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 20 Ophiuchi:
Celestial coordinates and finder chart of 20 Ophiuchi
20 Ophiuchi 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 20 Ophiuchi are provided in the following table:
The simplified sky map below shows the position of 20 Ophiuchi in the sky:
Visibility of 20 Ophiuchi from your location
Today's 20 Ophiuchi rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):
Digitized Sky Survey image of 20 Ophiuchi
The image below is a photograph of 20 Ophiuchi 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 20 Ophiuchi is 0.096 arcsec per year in Right Ascension and -0.093 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of 20 Ophiuchi from the Sun and relative movement
20 Ophiuchi is distant 120.56 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.
Spectral properties of 20 Ophiuchi
20 Ophiuchi belongs to spectral class F7 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where 20 Ophiuchi is situated in the Hertzsprung–Russell diagram.