78 Herculis

78 Herculis is a main-sequence star in the constellation of Hercules.

78 Herculis visual magnitude is 5.62. Because of its reltive faintness, 78 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 78 Herculis:

Color of 78 Herculis ⬤

Magnitude of 78 Herculis 5.62

Class Main-sequence

VISIBILITY RIGHT NOW 78 Herculis is above the horizon from Greenwich, United Kingdom [change]. Altitude: 66°.

Celestial coordinates and finder chart of 78 Herculis

78 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 78 Herculis are provided in the following table:

Right Ascension J2000 17h 31m 49s

Declination J2000 +28° 24’ 26”

Galactic Longitude 52.06°

Galactic Latitude 28.91°

Constellation Hercules

The simplified sky map below shows the position of 78 Herculis in the sky:

Simplified finder chart for 78 Herculis.

Visibility of 78 Herculis from your location

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

Today's 78 Herculis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 61.6° RISE 21:18

Max altitude: 66.9° TRANSIT 6:10

Azimuth: 298.4° SET 14:58

RIGHT NOW 78 Herculis is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 78 Herculis

The image below is a photograph of 78 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 78 Herculis is 0.006 arcsec per year in Right Ascension and 0.028 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 78 Herculis. The red arrow shows the motion of 78 Herculis during the next 10000 years (1.00 arcmin in Right Ascension and 4.67 arcmin in declination);

Distance of 78 Herculis from the Sun and relative movement

78 Herculis is distant 274.87 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

Distance (parsec) 84.32 pc

Distance (light year) 274.87 ly

Heliocentric radial velocity -26 km/s

Proper Motion RA 0.006 arcsec/year

Proper Motion Dec 0.028 arcsec/year

Spectral properties of 78 Herculis

78 Herculis belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 0.99

Spectral Type A1V

Color Index (B-V) 0

Temperature of 78 Herculis 10125K

The red dot in the diagram below shows where 78 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 78 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 78 Herculis

Flamsteed designation 78 Herculis

Henry Draper Catalogue HD159139

SAO Catalogue SAO85182

Hipparcos Catalogue HIP85790

Durchmusterung Catalogue BD+28 2767

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In Evidence

Other stars in Hercules