28 Herculis

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

28 Herculis visual magnitude is 5.63. Because of its reltive faintness, 28 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 28 Herculis:

Color of 28 Herculis ⬤

Magnitude of 28 Herculis 5.63

Class Giant

VISIBILITY RIGHT NOW 28 Herculis is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 28 Herculis

28 Herculis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 28 Herculis are provided in the following table:

Right Ascension J2000 16h 32m 35s

Declination J2000 +05° 31’ 15”

Galactic Longitude 21.01°

Galactic Latitude 33.25°

Constellation Hercules

The simplified sky map below shows the position of 28 Herculis in the sky:

Simplified finder chart for 28 Herculis.

Visibility of 28 Herculis from your location

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

Today's 28 Herculis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 84.5° RISE 22:13

Max altitude: 44.0° TRANSIT 4:42

Azimuth: 275.5° SET 11:08

RIGHT NOW 28 Herculis is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 28 Herculis

The image below is a photograph of 28 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 28 Herculis is 0.015 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 28 Herculis. The red arrow shows the motion of 28 Herculis during the next 10000 years (2.50 arcmin in Right Ascension and 0.17 arcmin in declination);

Distance of 28 Herculis from the Sun and relative movement

28 Herculis is distant 322.13 light years from the Sun and it is moving towards the Sun at the speed of 27 kilometers per second.

Distance (parsec) 98.81 pc

Distance (light year) 322.13 ly

Heliocentric radial velocity -27 km/s

Proper Motion RA 0.015 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of 28 Herculis

28 Herculis belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.66

Spectral Type B9III

Color Index (B-V) -0.06

Temperature of 28 Herculis 10941K

The red dot in the diagram below shows where 28 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 28 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 28 Herculis

Flamsteed designation 28 Herculis

Henry Draper Catalogue HD149121

SAO Catalogue SAO121676

Hipparcos Catalogue HIP81007

Durchmusterung Catalogue BD+05 3223

FK5 Catalogue 3309

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In Evidence

Other stars in Hercules