73 Ophiuchi is a variable and multiple main-sequence star in the constellation of Ophiuchus.
73 Ophiuchi visual magnitude is 5.73. Because of its reltive faintness, 73 Ophiuchi should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.
The table below summarizes the key facts about 73 Ophiuchi:
Celestial coordinates and finder chart of 73 Ophiuchi
73 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 73 Ophiuchi are provided in the following table:
The simplified sky map below shows the position of 73 Ophiuchi in the sky:
Visibility of 73 Ophiuchi from your location
Today's 73 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 73 Ophiuchi
The image below is a photograph of 73 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 73 Ophiuchi is 0.038 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of 73 Ophiuchi from the Sun and relative movement
73 Ophiuchi is distant 166.16 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.
Spectral properties of 73 Ophiuchi
73 Ophiuchi belongs to spectral class F2 and has a luminosity class of V corresponding to a main-sequence star.
The red dot in the diagram below shows where 73 Ophiuchi is situated in the Hertzsprung–Russell diagram.
73 Ophiuchi star system properties
73 Ophiuchi 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 73 Ophiuchi double sysyem: