15 Eridani

15 Eridani is a double giant star in the constellation of Eridanus.

15 Eridani visual magnitude is 4.88. Because of its moderate brightness, 15 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 15 Eridani:

Color of 15 Eridani ⬤

Magnitude of 15 Eridani 4.88

Class Giant

VISIBILITY RIGHT NOW 15 Eridani is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 15 Eridani

15 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 15 Eridani are provided in the following table:

Right Ascension J2000 03h 18m 22s

Declination J2000 -22° 30’ 41”

Galactic Longitude 213.26°

Galactic Latitude -56.46°

Constellation Eridanus

The simplified sky map below shows the position of 15 Eridani in the sky:

Simplified finder chart for 15 Eridani.

Visibility of 15 Eridani from your location

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

Today's 15 Eridani rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 112.5° RISE 11:42

Max altitude: 16.0° TRANSIT 15:35

Azimuth: 247.5° SET 19:28

RIGHT NOW 15 Eridani is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 15 Eridani

The image below is a photograph of 15 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 15 Eridani is 0.018 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 15 Eridani. The red arrow shows the motion of 15 Eridani during the next 10000 years (3.00 arcmin in Right Ascension and 2.00 arcmin in declination);

Distance of 15 Eridani from the Sun and relative movement

15 Eridani is distant 254.89 light years from the Sun and it is moving far from the Sun at the speed of 24 kilometers per second.

Distance (parsec) 78.19 pc

Distance (light year) 254.89 ly

Heliocentric radial velocity 24 km/s

Proper Motion RA 0.018 arcsec/year

Proper Motion Dec 0.012 arcsec/year

Spectral properties of 15 Eridani

15 Eridani belongs to spectral class G6 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.41

Spectral Type G6III

Color Index (B-V) 0.9

Temperature of 15 Eridani 4996K

The red dot in the diagram below shows where 15 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 15 Eridani. Attribution: Richard Powell / CC BY-SA

15 Eridani star system properties

15 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 15 Eridani double sysyem:

Main star magnitude 4.88

Secondary star magnitude 6.18

Magnitude difference 1.3

Separation 0.2 arcsec

Alternative designations of 15 Eridani

Flamsteed designation 15 Eridani

Henry Draper Catalogue HD20610

SAO Catalogue SAO168452

Hipparcos Catalogue HIP15382

Durchmusterung Catalogue BD-22 1146

Aitken Double Star Catalogue ADS2463

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Other stars in Eridanus