υ1 Eridani (upsilon1 Eridani)

Altitude: -67.5° Azimuth: 17.8° Direction: North-North-East

υ1 Eridani is a variable hypergiant star in the constellation of Eridanus.

υ1 Eridani visual magnitude is 4.51. Because of its moderate brightness, υ1 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 υ1 Eridani:

Color of υ1 Eridani ⬤

Magnitude of υ1 Eridani 4.51

Class Hypergiant

VISIBILITY RIGHT NOW

υ1 Eridani (upsilon1 Eridani) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -67.5°
Azimuth: 17.8°
Direction: North-North-East

Celestial coordinates and finder chart of υ1 Eridani

υ1 Eridani is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of υ1 Eridani are provided in the following table:

Right Ascension J2000 04h 33m 30s

Declination J2000 -29° 46’ 00”

Galactic Longitude 229.85°

Galactic Latitude -41.59°

Constellation Eridanus

The simplified sky map below shows the position of υ1 Eridani in the sky:

Finder chart υ1 Eridani (upsilon1 Eridani) star

Simplified finder chart for υ1 Eridani (upsilon1 Eridani).

Visibility of υ1 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 υ1 Eridani (upsilon1 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: 119.8° RISE 9:39

Max altitude: 8.8° TRANSIT 12:34

Azimuth: 240.2° SET 15:30

RIGHT NOW υ1 Eridani (upsilon1 Eridani) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of υ1 Eridani

The image below is a photograph of υ1 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 υ1 Eridani is -0.102 arcsec per year in Right Ascension and -0.275 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of υ1 Eridani (upsilon1 Eridani) star

DSS2 image of υ1 Eridani. The red arrow shows the motion of υ1 Eridani during the next 1000 years (-1.70 arcmin in Right Ascension and -4.58 arcmin in declination);

Distance of υ1 Eridani from the Sun and relative movement

υ1 Eridani is distant 124.33 light years from the Sun and it is moving far from the Sun at the speed of 21 kilometers per second.

Distance (parsec) 38.14 pc

Distance (light year) 124.33 ly

Heliocentric radial velocity 21 km/s

Proper Motion RA -0.102 arcsec/year

Proper Motion Dec -0.275 arcsec/year

Spectral properties of υ1 Eridani

υ1 Eridani belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 1.60

Spectral Type K0III

Color Index (B-V) 0.98

Temperature of υ1 Eridani 4791K

The red dot in the diagram below shows where υ1 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of υ1 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of υ1 Eridani

Bayer designation υ1 Eridani
(upsilon1 Eridani)

Flamsteed designation 50 Eridani

Henry Draper Catalogue HD29085

SAO Catalogue SAO169570

Hipparcos Catalogue HIP21248

Durchmusterung Catalogue CD-30 1883

General Catalogue of Variable Stars 1650

In Evidence

Other stars in Eridanus