30 Herculis

30 Herculis is a variable giant star in the constellation of Hercules.

30 Herculis visual magnitude is 5.04. Because of its reltive faintness, 30 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 30 Herculis:

Color of 30 Herculis ⬤

Magnitude of 30 Herculis 5.04

Class Giant

VISIBILITY RIGHT NOW 30 Herculis is above the horizon from Greenwich, United Kingdom [change]. Altitude: 72°.

Celestial coordinates and finder chart of 30 Herculis

30 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 30 Herculis are provided in the following table:

Right Ascension J2000 16h 28m 38s

Declination J2000 +41° 52’ 54”

Galactic Longitude 66.16°

Galactic Latitude 43.72°

Constellation Hercules

The simplified sky map below shows the position of 30 Herculis in the sky:

Simplified finder chart for 30 Herculis.

Visibility of 30 Herculis from your location

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

30 Herculis is circumpolar and transits at 04:23 UTC (altitude: 80.4°)

Digitized Sky Survey image of 30 Herculis

The image below is a photograph of 30 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 30 Herculis is 0.03 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 30 Herculis. The red arrow shows the motion of 30 Herculis during the next 10000 years (5.00 arcmin in Right Ascension and -1.50 arcmin in declination);

Distance of 30 Herculis from the Sun and relative movement

30 Herculis is distant 361.02 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 110.74 pc

Distance (light year) 361.02 ly

Heliocentric radial velocity 3 km/s

Proper Motion RA 0.03 arcsec/year

Proper Motion Dec -0.009 arcsec/year

Spectral properties of 30 Herculis

30 Herculis belongs to spectral class M6 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.18

Spectral Type M6III

Color Index (B-V) 1.52

Temperature of 30 Herculis 3764K

The red dot in the diagram below shows where 30 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 30 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 30 Herculis

Flamsteed designation 30 Herculis

Henry Draper Catalogue HD148783

SAO Catalogue SAO46108

Hipparcos Catalogue HIP80704

Durchmusterung Catalogue BD+42 2714

FK5 Catalogue 3303

General Catalogue of Variable Stars g Her

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In Evidence

Other stars in Hercules