54 Eridani

54 Eridani is a variable and double giant star in the constellation of Eridanus.

54 Eridani visual magnitude is 4.32. Because of its moderate brightness, 54 Eridani should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 54 Eridani:

Color of 54 Eridani ⬤

Magnitude of 54 Eridani 4.32

Class Giant

VISIBILITY RIGHT NOW 54 Eridani is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 54 Eridani

54 Eridani 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 54 Eridani are provided in the following table:

Right Ascension J2000 04h 40m 26s

Declination J2000 -19° 40’ 18”

Galactic Longitude 217.79°

Galactic Latitude -37.36°

Constellation Eridanus

The simplified sky map below shows the position of 54 Eridani in the sky:

Simplified finder chart for 54 Eridani.

Visibility of 54 Eridani from your location

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

Today's 54 Eridani rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.7° RISE 12:20

Max altitude: 18.8° TRANSIT 16:32

Azimuth: 250.3° SET 20:44

RIGHT NOW 54 Eridani is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 54 Eridani

The image below is a photograph of 54 Eridani 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 54 Eridani is 0.021 arcsec per year in Right Ascension and -0.096 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 54 Eridani. The red arrow shows the motion of 54 Eridani during the next 1000 years (0.35 arcmin in Right Ascension and -1.60 arcmin in declination);

Distance of 54 Eridani from the Sun and relative movement

54 Eridani is distant 361.02 light years from the Sun and it is moving towards the Sun at the speed of 33 kilometers per second.

Distance (parsec) 110.74 pc

Distance (light year) 361.02 ly

Heliocentric radial velocity -33 km/s

Proper Motion RA 0.021 arcsec/year

Proper Motion Dec -0.096 arcsec/year

Spectral properties of 54 Eridani

54 Eridani belongs to spectral class M4 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.90

Spectral Type M4III

Color Index (B-V) 1.61

Temperature of 54 Eridani 3635K

The red dot in the diagram below shows where 54 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 54 Eridani. Attribution: Richard Powell / CC BY-SA

54 Eridani star system properties

54 Eridani is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 54 Eridani double sysyem:

Main star magnitude 4.32

Secondary star magnitude 4.62

Magnitude difference 0.3

Separation 0.1 arcsec

Alternative designations of 54 Eridani

Flamsteed designation 54 Eridani

Henry Draper Catalogue HD29755

SAO Catalogue SAO149818

Hipparcos Catalogue HIP21763

Durchmusterung Catalogue BD-19 988

General Catalogue of Variable Stars DM Eri

Aitken Double Star Catalogue ADS3380

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Other stars in Eridanus