HR6690

HR6690 is a giant star in the constellation of Ophiuchus.

HR6690 visual magnitude is 6.29. Because of its reltive faintness, HR6690 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 HR6690:

Color of HR6690 ⬤

Magnitude of HR6690 6.29

Class Giant

VISIBILITY RIGHT NOW HR6690 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR6690

HR6690 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 HR6690 are provided in the following table:

Right Ascension J2000 17h 56m 56s

Declination J2000 +06° 29’ 16”

Galactic Longitude 32.57°

Galactic Latitude 15.06°

Constellation Ophiuchus

The simplified sky map below shows the position of HR6690 in the sky:

Simplified finder chart for HR6690.

Visibility of HR6690 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR6690 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 83.5° RISE 0:00

Max altitude: 45.0° TRANSIT 6:35

Azimuth: 276.5° SET 13:06

RIGHT NOW HR6690 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6690

The image below is a photograph of HR6690 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 HR6690 is 0.026 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6690. The red arrow shows the motion of HR6690 during the next 10000 years (4.33 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of HR6690 from the Sun and relative movement

HR6690 is distant 680.58 light years from the Sun and it is moving towards the Sun at the speed of 14 kilometers per second.

Distance (parsec) 208.77 pc

Distance (light year) 680.58 ly

Heliocentric radial velocity -14 km/s

Proper Motion RA 0.026 arcsec/year

Proper Motion Dec 0.002 arcsec/year

Spectral properties of HR6690

HR6690 belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.31

Spectral Type B9III

Color Index (B-V) 0

Temperature of HR6690 10125K

The red dot in the diagram below shows where HR6690 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6690. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6690

Henry Draper Catalogue HD163641

SAO Catalogue SAO122949

Hipparcos Catalogue HIP87866

Durchmusterung Catalogue BD+06 3578

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In Evidence

Other stars in Ophiuchus