HR6728

HR6728 is a variable hypergiant star in the constellation of Hercules.

HR6728 visual magnitude is 5.67. Because of its reltive faintness, HR6728 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 HR6728:

Color of HR6728 ⬤

Magnitude of HR6728 5.67

Class Hypergiant

VISIBILITY RIGHT NOW HR6728 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 12°.

Celestial coordinates and finder chart of HR6728

HR6728 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 HR6728 are provided in the following table:

Right Ascension J2000 17h 59m 56s

Declination J2000 +45° 30’ 05”

Galactic Longitude 72.45°

Galactic Latitude 27.66°

Constellation Hercules

The simplified sky map below shows the position of HR6728 in the sky:

Simplified finder chart for HR6728.

Visibility of HR6728 from your location

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

HR6728 is circumpolar and transits at 05:22 UTC (altitude: 84.0°)

Digitized Sky Survey image of HR6728

The image below is a photograph of HR6728 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 HR6728 is 0.008 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6728. The red arrow shows the motion of HR6728 during the next 10000 years (1.33 arcmin in Right Ascension and -4.17 arcmin in declination);

Distance of HR6728 from the Sun and relative movement

HR6728 is distant 610.49 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 187.27 pc

Distance (light year) 610.49 ly

Heliocentric radial velocity -10 km/s

Proper Motion RA 0.008 arcsec/year

Proper Motion Dec -0.025 arcsec/year

Spectral properties of HR6728

HR6728 belongs to spectral class M0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude -0.69

Spectral Type M0III

Color Index (B-V) 1.57

Temperature of HR6728 3691K

The red dot in the diagram below shows where HR6728 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6728. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6728

Henry Draper Catalogue HD164646

SAO Catalogue SAO47121

Hipparcos Catalogue HIP88122

Durchmusterung Catalogue BD+45 2638

FK5 Catalogue 3433

General Catalogue of Variable Stars 9980

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In Evidence

Other stars in Hercules