74 Herculis

74 Herculis is a variable hypergiant star in the constellation of Hercules.

74 Herculis visual magnitude is 5.59. Because of its reltive faintness, 74 Herculis 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 74 Herculis:

Color of 74 Herculis ⬤

Magnitude of 74 Herculis 5.59

Class Hypergiant

VISIBILITY RIGHT NOW 74 Herculis is above the horizon from Greenwich, United Kingdom [change]. Altitude: 30°.

Celestial coordinates and finder chart of 74 Herculis

74 Herculis 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 74 Herculis are provided in the following table:

Right Ascension J2000 17h 20m 21s

Declination J2000 +46° 14’ 26”

Galactic Longitude 72.16°

Galactic Latitude 34.58°

Constellation Hercules

The simplified sky map below shows the position of 74 Herculis in the sky:

Simplified finder chart for 74 Herculis.

Visibility of 74 Herculis from your location

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

74 Herculis is circumpolar and transits at 05:30 UTC (altitude: 84.8°)

Digitized Sky Survey image of 74 Herculis

The image below is a photograph of 74 Herculis 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 74 Herculis is -0.029 arcsec per year in Right Ascension and 0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 74 Herculis. The red arrow shows the motion of 74 Herculis during the next 10000 years (-4.83 arcmin in Right Ascension and 7.17 arcmin in declination);

Distance of 74 Herculis from the Sun and relative movement

74 Herculis is distant 575.97 light years from the Sun and it is moving towards the Sun at the speed of 57 kilometers per second.

Distance (parsec) 176.68 pc

Distance (light year) 575.97 ly

Heliocentric radial velocity -57 km/s

Proper Motion RA -0.029 arcsec/year

Proper Motion Dec 0.043 arcsec/year

Spectral properties of 74 Herculis

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

Absolute magnitude -0.65

Spectral Type M0III

Color Index (B-V) 1.57

Temperature of 74 Herculis 3691K

The red dot in the diagram below shows where 74 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 74 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 74 Herculis

Flamsteed designation 74 Herculis

Henry Draper Catalogue HD157325

SAO Catalogue SAO46645

Hipparcos Catalogue HIP84835

Durchmusterung Catalogue BD+46 2293

FK5 Catalogue 3377

General Catalogue of Variable Stars 8556

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In Evidence

Other stars in Hercules