43 Herculis

43 Herculis is a variable and multiple giant star in the constellation of Hercules.

43 Herculis visual magnitude is 5.15. Because of its reltive faintness, 43 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 43 Herculis:

Color of 43 Herculis ⬤

Magnitude of 43 Herculis 5.15

Class Giant

VISIBILITY RIGHT NOW 43 Herculis is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 43 Herculis

43 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 43 Herculis are provided in the following table:

Right Ascension J2000 16h 45m 49s

Declination J2000 +08° 34’ 56”

Galactic Longitude 26.03°

Galactic Latitude 31.77°

Constellation Hercules

The simplified sky map below shows the position of 43 Herculis in the sky:

Simplified finder chart for 43 Herculis.

Visibility of 43 Herculis from your location

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

Today's 43 Herculis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.4° RISE 22:10

Max altitude: 47.1° TRANSIT 4:55

Azimuth: 278.6° SET 11:37

RIGHT NOW 43 Herculis is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 43 Herculis

The image below is a photograph of 43 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 43 Herculis is 0 arcsec per year in Right Ascension and 0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 43 Herculis. The red arrow shows the motion of 43 Herculis during the next 10000 years (0.00 arcmin in Right Ascension and 2.50 arcmin in declination);

Distance of 43 Herculis from the Sun and relative movement

43 Herculis is distant 350.54 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 107.53 pc

Distance (light year) 350.54 ly

Heliocentric radial velocity -21 km/s

Proper Motion Dec 0.015 arcsec/year

Spectral properties of 43 Herculis

43 Herculis belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.01

Spectral Type K5III

Color Index (B-V) 1.53

Temperature of 43 Herculis 3749K

The red dot in the diagram below shows where 43 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 43 Herculis. Attribution: Richard Powell / CC BY-SA

43 Herculis star system properties

43 Herculis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 43 Herculis double sysyem:

Main star magnitude 5.15

Secondary star magnitude 9.05

Magnitude difference 3.9

Separation 82.5 arcsec

Alternative designations of 43 Herculis

Flamsteed designation 43 Herculis

Henry Draper Catalogue HD151217

SAO Catalogue SAO121843

Hipparcos Catalogue HIP82073

Durchmusterung Catalogue BD+08 3271

FK5 Catalogue 3332

General Catalogue of Variable Stars 7952

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In Evidence

Other stars in Hercules