4 Eridani

Altitude: -27.9° Azimuth: 265.9° Direction: West

4 Eridani is a main-sequence star in the constellation of Eridanus.

4 Eridani visual magnitude is 5.45. Because of its reltive faintness, 4 Eridani 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 4 Eridani:

Color of 4 Eridani ⬤

Magnitude of 4 Eridani 5.45

Class Main-sequence

VISIBILITY RIGHT NOW

4 Eridani is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -27.9°
Azimuth: 265.9°
Direction: West

Celestial coordinates and finder chart of 4 Eridani

4 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 4 Eridani are provided in the following table:

Right Ascension J2000 02h 57m 23s

Declination J2000 -23° 51’ 42”

Galactic Longitude 213.46°

Galactic Latitude -61.47°

Constellation Eridanus

The simplified sky map below shows the position of 4 Eridani in the sky:

Simplified finder chart for 4 Eridani.

Visibility of 4 Eridani from your location

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

Today's 4 Eridani rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.9° RISE 18:15

Max altitude: 14.7° TRANSIT 21:59

Azimuth: 246.1° SET 1:47

Digitized Sky Survey image of 4 Eridani

The image below is a photograph of 4 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 4 Eridani is 0.098 arcsec per year in Right Ascension and -0.03 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 4 Eridani. The red arrow shows the motion of 4 Eridani during the next 1000 years (1.63 arcmin in Right Ascension and -0.50 arcmin in declination);

Distance of 4 Eridani from the Sun and relative movement

4 Eridani is distant 158.71 light years from the Sun and it is moving far from the Sun at the speed of 29 kilometers per second.

Distance (parsec) 48.69 pc

Distance (light year) 158.71 ly

Heliocentric radial velocity 29 km/s

Proper Motion RA 0.098 arcsec/year

Proper Motion Dec -0.03 arcsec/year

Spectral properties of 4 Eridani

4 Eridani belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 2.01

Spectral Type A5V

Color Index (B-V) 0.23

Temperature of 4 Eridani 7938K

The red dot in the diagram below shows where 4 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 4 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of 4 Eridani

Flamsteed designation 4 Eridani

Henry Draper Catalogue HD18454

SAO Catalogue SAO168183

Hipparcos Catalogue HIP13782

Durchmusterung Catalogue CD-24 1336

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In Evidence

Other stars in Eridanus