HR6591

Altitude: 61.5° Azimuth: 124.4° Direction: South-East

HR6591 is a double hypergiant star in the constellation of Hercules.

HR6591 visual magnitude is 6.28. Because of its reltive faintness, HR6591 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 HR6591:

Color of HR6591 ⬤

Magnitude of HR6591 6.28

Class Hypergiant

VISIBILITY RIGHT NOW

HR6591 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 61.5°
Azimuth: 124.4°
Direction: South-East

Celestial coordinates and finder chart of HR6591

HR6591 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6591 are provided in the following table:

Right Ascension J2000 17h 40m 41s

Declination J2000 +31° 17’ 15”

Galactic Longitude 55.83°

Galactic Latitude 27.9°

Constellation Hercules

The simplified sky map below shows the position of HR6591 in the sky:

Simplified finder chart for HR6591.

Visibility of HR6591 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 HR6591 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: 58.7° RISE 8:59

Max altitude: 69.8° TRANSIT 18:15

Azimuth: 301.3° SET 3:35

Digitized Sky Survey image of HR6591

The image below is a photograph of HR6591 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 HR6591 is -0.067 arcsec per year in Right Ascension and -0.073 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6591. The red arrow shows the motion of HR6591 during the next 10000 years (-11.17 arcmin in Right Ascension and -12.17 arcmin in declination);

Distance of HR6591 from the Sun and relative movement

HR6591 is distant 402.97 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

Distance (parsec) 123.61 pc

Distance (light year) 402.97 ly

Heliocentric radial velocity -6 km/s

Proper Motion RA -0.067 arcsec/year

Proper Motion Dec -0.073 arcsec/year

Spectral properties of HR6591

HR6591 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.82

Spectral Type K0III

Color Index (B-V) 1.05

Temperature of HR6591 4626K

The red dot in the diagram below shows where HR6591 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6591. Attribution: Richard Powell / CC BY-SA

HR6591 star system properties

HR6591 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR6591 double sysyem:

Main star magnitude 6.28

Secondary star magnitude 8.38

Magnitude difference 2.1

Separation 115 arcsec

Alternative designations of HR6591

Henry Draper Catalogue HD160822

SAO Catalogue SAO66243

Hipparcos Catalogue HIP86506

Durchmusterung Catalogue BD+31 3076

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In Evidence

Other stars in Hercules