47 Eridani

Altitude: 20.4° Azimuth: 135.5° Direction: South-East

47 Eridani is a variable giant star in the constellation of Eridanus.

47 Eridani visual magnitude is 5.11. Because of its reltive faintness, 47 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 47 Eridani:

Color of 47 Eridani ⬤

Magnitude of 47 Eridani 5.11

Class Giant

VISIBILITY RIGHT NOW

47 Eridani is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 20.4°
Azimuth: 135.5°
Direction: South-East

Celestial coordinates and finder chart of 47 Eridani

47 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 47 Eridani are provided in the following table:

Right Ascension J2000 04h 34m 11s

Declination J2000 -08° 13’ 53”

Galactic Longitude 204.1°

Galactic Latitude -34.18°

Constellation Eridanus

The simplified sky map below shows the position of 47 Eridani in the sky:

Simplified finder chart for 47 Eridani.

Visibility of 47 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 47 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: 98.2° RISE 18:00

Max altitude: 30.3° TRANSIT 23:16

Azimuth: 261.8° SET 4:36

Digitized Sky Survey image of 47 Eridani

The image below is a photograph of 47 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 47 Eridani is -0.018 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 47 Eridani. The red arrow shows the motion of 47 Eridani during the next 10000 years (-3.00 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of 47 Eridani from the Sun and relative movement

47 Eridani is distant 804.94 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 246.91 pc

Distance (light year) 804.94 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA -0.018 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of 47 Eridani

47 Eridani belongs to spectral class M3 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.85

Spectral Type M3III

Color Index (B-V) 1.7

Temperature of 47 Eridani 3516K

The red dot in the diagram below shows where 47 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 47 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of 47 Eridani

Flamsteed designation 47 Eridani

Henry Draper Catalogue HD29064

SAO Catalogue SAO131315

Hipparcos Catalogue HIP21296

Durchmusterung Catalogue BD-08 887

FK5 Catalogue 2337

General Catalogue of Variable Stars DV Eri

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In Evidence

Other stars in Eridanus