30 Eridani

Above the horizon. Rise: 7:24 | Tran: 12:56 | Set: 18:27

Alt: 22.17° Az: 227.81° Direction: South-West

30 Eridani is a double main-sequence star of spectral class B8 in the constellation of Eridanus.

30 Eridani visual magnitude is 5.48. Because of its faintness, 30 Eridani is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

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);

Celestial Coordinates

Apparent

Right Ascension 03h 53m 56s

Declination -05° 17’ 13”

Hour Angle 02h 54m 13s

Sidereal Time 06h 48m 10s

J2000

Right Ascension 03h 52m 41s

Declination -05° 21’ 41”

Galactic Coordinates

Galactic Longitude 194.49°

Galactic Latitude -41.74°

Finder Chart

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Finder chart for 30 Eridani.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.48

Class Main-sequence

Absolute magnitude -0.46

Spectral Type B8V

Color Index (B-V) -0.1

Temperature 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

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

Distance, Radial Speed, Proper Motion

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

Distance (light year) 502.31

Radial Speed 15 km/s

Proper Motion RA -0.011 arcsec/y

Proper Motion Dec -0.011"/y

Alternative Designations

Flamsteed designation 30 Eridani

Henry Draper Catalogue HD24388

SAO Catalogue SAO130789

Hipparcos Catalogue HIP18141

Durchmusterung Catalogue BD-05 769

Aitken Double Star Catalogue ADS2832

Visibility from Your Location

Today's 30 Eridani rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 95.3° RISE 7:24

Max altitude: 33.2° TRANSIT 12:56

Azimuth: 264.7° SET 18:27

Set Location

Other stars in Eridanus