39 Herculis

39 Herculis is a giant star in the constellation of Hercules.

39 Herculis visual magnitude is 5.92. Because of its reltive faintness, 39 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 39 Herculis:

Color of 39 Herculis ⬤

Magnitude of 39 Herculis 5.92

Class Giant

VISIBILITY RIGHT NOW 39 Herculis is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 39 Herculis

39 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 39 Herculis are provided in the following table:

Right Ascension J2000 16h 41m 36s

Declination J2000 +26° 55’ 00”

Galactic Longitude 46.72°

Galactic Latitude 39.22°

Constellation Hercules

The simplified sky map below shows the position of 39 Herculis in the sky:

Simplified finder chart for 39 Herculis.

Visibility of 39 Herculis from your location

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

Today's 39 Herculis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 63.1° RISE 20:12

Max altitude: 65.4° TRANSIT 4:51

Azimuth: 296.9° SET 13:27

RIGHT NOW 39 Herculis is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 39 Herculis

The image below is a photograph of 39 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 39 Herculis is 0.002 arcsec per year in Right Ascension and -0.044 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 39 Herculis. The red arrow shows the motion of 39 Herculis during the next 10000 years (0.33 arcmin in Right Ascension and -7.33 arcmin in declination);

Distance of 39 Herculis from the Sun and relative movement

39 Herculis is distant 139.61 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 42.83 pc

Distance (light year) 139.61 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA 0.002 arcsec/year

Proper Motion Dec -0.044 arcsec/year

Spectral properties of 39 Herculis

39 Herculis belongs to spectral class F2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 2.76

Spectral Type F2III

Color Index (B-V) 0.4

Temperature of 39 Herculis 6880K

The red dot in the diagram below shows where 39 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 39 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 39 Herculis

Flamsteed designation 39 Herculis

Henry Draper Catalogue HD150682

SAO Catalogue SAO84543

Hipparcos Catalogue HIP81729

Durchmusterung Catalogue BD+27 2668

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In Evidence

Other stars in Hercules