Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:09 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Eridanus » 

17 Eridani

Altitude: -39.0°   Azimuth: 33.6°   Direction: North-North-East

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

17 Eridani visual magnitude is 4.73. Because of its moderate brightness, 17 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 17 Eridani:


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

Altitude: -39.0°
Azimuth: 33.6°
Direction: North-North-East

Celestial coordinates and finder chart of 17 Eridani

17 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 17 Eridani are provided in the following table:

03h 30m 37s
-05° 04’ 31”

The simplified sky map below shows the position of 17 Eridani in the sky:

Finder chart 17 Eridani star
Simplified finder chart for 17 Eridani.

Visibility of 17 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 17 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: 95.1°
Max altitude: 33.4°
Azimuth: 264.9°
17 Eridani is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 17 Eridani

The image below is a photograph of 17 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 17 Eridani is 0.014 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 17 Eridani star
DSS2 image of 17 Eridani. The red arrow shows the motion of 17 Eridani during the next 10000 years (2.33 arcmin in Right Ascension and 1.17 arcmin in declination);

Distance of 17 Eridani from the Sun and relative movement

17 Eridani is distant 380.40 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

116.69 pc
380.40 ly
15 km/s
0.014 arcsec/year
0.007 arcsec/year

Spectral properties of 17 Eridani

17 Eridani belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 17 Eridani is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 17 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of 17 Eridani