30 Eridani

Altitude: 3.5° Azimuth: 256.9° Direction: West-South-West

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

30 Eridani visual magnitude is 5.48. Because of its reltive faintness, 30 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 30 Eridani:

Color of 30 Eridani ⬤

Magnitude of 30 Eridani 5.48

Class Main-sequence

VISIBILITY RIGHT NOW

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

Altitude: 3.5°
Azimuth: 256.9°
Direction: West-South-West

Celestial coordinates and finder chart of 30 Eridani

30 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 30 Eridani are provided in the following table:

Right Ascension J2000 03h 52m 41s

Declination J2000 -05° 21’ 41”

Galactic Longitude 194.49°

Galactic Latitude -41.74°

Constellation Eridanus

The simplified sky map below shows the position of 30 Eridani in the sky:

Simplified finder chart for 30 Eridani.

Visibility of 30 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 30 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: 95.4° RISE 17:43

Max altitude: 33.2° TRANSIT 23:14

Azimuth: 264.6° SET 4:49

Digitized Sky Survey image of 30 Eridani

The image below is a photograph of 30 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 30 Eridani is -0.011 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 30 Eridani. The red arrow shows the motion of 30 Eridani during the next 10000 years (-1.83 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of 30 Eridani from the Sun and relative movement

30 Eridani is distant 502.31 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

Distance (parsec) 154.08 pc

Distance (light year) 502.31 ly

Heliocentric radial velocity 15 km/s

Proper Motion RA -0.011 arcsec/year

Proper Motion Dec -0.011 arcsec/year

Spectral properties of 30 Eridani

30 Eridani belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.46

Spectral Type B8V

Color Index (B-V) -0.1

Temperature of 30 Eridani 11573K

The red dot in the diagram below shows where 30 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 30 Eridani. Attribution: Richard Powell / CC BY-SA

30 Eridani star system properties

30 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 30 Eridani double sysyem:

Main star magnitude 5.48

Secondary star magnitude 12.18

Magnitude difference 6.7

Separation 8.3 arcsec

Alternative designations of 30 Eridani

Flamsteed designation 30 Eridani

Henry Draper Catalogue HD24388

SAO Catalogue SAO130789

Hipparcos Catalogue HIP18141

Durchmusterung Catalogue BD-05 769

Aitken Double Star Catalogue ADS2832

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In Evidence

Other stars in Eridanus