HR6947

HR6947 is a variable and multiple supergiant star in the constellation of Sagittarius.

HR6947 visual magnitude is 6.68. Because of its reltive faintness, HR6947 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 HR6947:

Color of HR6947 ⬤

Magnitude of HR6947 6.68

Class Supergiant

VISIBILITY RIGHT NOW HR6947 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR6947

HR6947 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 HR6947 are provided in the following table:

Right Ascension J2000 18h 31m 53s

Declination J2000 -19° 07’ 29”

Galactic Longitude 13.71°

Galactic Latitude -4.46°

Constellation Sagittarius

The simplified sky map below shows the position of HR6947 in the sky:

Simplified finder chart for HR6947.

Visibility of HR6947 from your location

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

Today's HR6947 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.1° RISE 2:43

Max altitude: 19.4° TRANSIT 6:58

Azimuth: 250.9° SET 11:13

RIGHT NOW HR6947 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6947

The image below is a photograph of HR6947 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 HR6947 is -0.009 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR6947. The red arrow shows the motion of HR6947 during the next 100000 years (-15.00 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of HR6947 from the Sun and relative movement

HR6947 is distant 12,074.07 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 3,703.70 pc

Distance (light year) 12,074.07 ly

Heliocentric radial velocity 2 km/s

Proper Motion RA -0.009 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of HR6947

HR6947 belongs to spectral class G1 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -6.16

Spectral Type G1I

Color Index (B-V) 1.13

Temperature of HR6947 4451K

The red dot in the diagram below shows where HR6947 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6947. Attribution: Richard Powell / CC BY-SA

HR6947 star system properties

HR6947 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR6947 double sysyem:

Main star magnitude 6.68

Secondary star magnitude 8.68

Magnitude difference 2

Separation 430.7 arcsec

Alternative designations of HR6947

Henry Draper Catalogue HD170764

SAO Catalogue SAO161571

Hipparcos Catalogue HIP90836

Durchmusterung Catalogue BD-19 5047

General Catalogue of Variable Stars U Sgr

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Other stars in Sagittarius