HR6691

Altitude: -70.5° Azimuth: 311.6° Direction: North-West

HR6691 is a double giant star in the constellation of Sagittarius.

HR6691 visual magnitude is 5.74. Because of its reltive faintness, HR6691 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 HR6691:

Color of HR6691 ⬤

Magnitude of HR6691 5.74

Class Giant

VISIBILITY RIGHT NOW

HR6691 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -70.5°
Azimuth: 311.6°
Direction: North-West

Celestial coordinates and finder chart of HR6691

HR6691 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6691 are provided in the following table:

Right Ascension J2000 17h 58m 55s

Declination J2000 -36° 51’ 29”

Galactic Longitude 354.57°

Galactic Latitude -6.42°

Constellation Sagittarius

The simplified sky map below shows the position of HR6691 in the sky:

Simplified finder chart for HR6691.

Visibility of HR6691 from your location

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

Today's HR6691 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 126.9° RISE 11:20

Max altitude: 1.7° TRANSIT 12:39

Azimuth: 233.1° SET 13:57

Digitized Sky Survey image of HR6691

The image below is a photograph of HR6691 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 HR6691 is 0.008 arcsec per year in Right Ascension and 0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6691. The red arrow shows the motion of HR6691 during the next 10000 years (1.33 arcmin in Right Ascension and 2.17 arcmin in declination);

Distance of HR6691 from the Sun and relative movement

HR6691 is distant 365.06 light years from the Sun and it is moving towards the Sun at the speed of 87 kilometers per second.

Distance (parsec) 111.98 pc

Distance (light year) 365.06 ly

Heliocentric radial velocity -87 km/s

Proper Motion RA 0.008 arcsec/year

Proper Motion Dec 0.013 arcsec/year

Spectral properties of HR6691

HR6691 belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.49

Spectral Type G8III

Color Index (B-V) 0.9

Temperature of HR6691 4996K

The red dot in the diagram below shows where HR6691 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6691. Attribution: Richard Powell / CC BY-SA

HR6691 star system properties

HR6691 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR6691 double sysyem:

Main star magnitude 5.74

Secondary star magnitude 8.14

Magnitude difference 2.4

Separation 51.7 arcsec

Alternative designations of HR6691

Henry Draper Catalogue HD163652

SAO Catalogue SAO209545

Hipparcos Catalogue HIP88038

Durchmusterung Catalogue CD-3612060

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In Evidence

Other stars in Sagittarius