HR6639
HR6639 is a hypergiant star in the constellation of Ophiuchus.
HR6639 visual magnitude is 6.47. Because of its reltive faintness, HR6639 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.
The proper motion of HR6639 is -0.025 arcsec per year in Right Ascension and 0.065 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Key facts about HR6639
HR6639 is below the horizon from Greenwich, United Kingdom .
Altitude: -30.8°
Azimuth: 324.5°
Direction: North-West
Celestial coordinates and finder chart of HR6639
HR6639 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 HR6639 are provided in the following table:
The simplified sky map below shows the position of HR6639 in the sky:
Visibility of HR6639 from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
Today's HR6639 rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):
Distance of HR6639 from the Sun and relative movement
HR6639 is distant 341.72 light years from the Sun and it is moving towards the Sun at the speed of 58 kilometers per second.
Spectral properties of HR6639
HR6639 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.
The red dot in the diagram below shows where HR6639 is situated in the Hertzsprung–Russell diagram.
