ρ1 Eridani (rho1 Eridani)

ρ1 Eridani is a hypergiant star in the constellation of Eridanus.

ρ1 Eridani visual magnitude is 5.75. Because of its reltive faintness, ρ1 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 ρ1 Eridani:

Color of ρ1 Eridani ⬤

Magnitude of ρ1 Eridani 5.75

Class Hypergiant

VISIBILITY RIGHT NOW ρ1 Eridani (rho1 Eridani) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 3°.

Celestial coordinates and finder chart of ρ1 Eridani

ρ1 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 ρ1 Eridani are provided in the following table:

Right Ascension J2000 03h 01m 09s

Declination J2000 -07° 39’ 46”

Galactic Longitude 186.62°

Galactic Latitude -53.64°

Constellation Eridanus

The simplified sky map below shows the position of ρ1 Eridani in the sky:

Finder chart ρ1 Eridani (rho1 Eridani) star

Simplified finder chart for ρ1 Eridani (rho1 Eridani).

Visibility of ρ1 Eridani from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's ρ1 Eridani (rho1 Eridani) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 97.7° RISE 9:42

Max altitude: 30.9° TRANSIT 15:01

Azimuth: 262.3° SET 20:21

RIGHT NOW ρ1 Eridani (rho1 Eridani) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ρ1 Eridani

The image below is a photograph of ρ1 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 ρ1 Eridani is 0.098 arcsec per year in Right Ascension and -0.07 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of ρ1 Eridani. The red arrow shows the motion of ρ1 Eridani during the next 1000 years (1.63 arcmin in Right Ascension and -1.17 arcmin in declination);

Distance of ρ1 Eridani from the Sun and relative movement

ρ1 Eridani is distant 304.39 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

Distance (parsec) 93.37 pc

Distance (light year) 304.39 ly

Heliocentric radial velocity 14 km/s

Proper Motion RA 0.098 arcsec/year

Proper Motion Dec -0.07 arcsec/year

Spectral properties of ρ1 Eridani

ρ1 Eridani belongs to spectral class K0 and has a luminosity class of II corresponding to a hypergiant star.

Absolute magnitude 0.90

Spectral Type K0II

Color Index (B-V) 1.05

Temperature of ρ1 Eridani 4626K

The red dot in the diagram below shows where ρ1 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ρ1 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of ρ1 Eridani

Bayer designation ρ1 Eridani
(rho1 Eridani)

Flamsteed designation 8 Eridani

Henry Draper Catalogue HD18784

SAO Catalogue SAO130243

Hipparcos Catalogue HIP14060

Durchmusterung Catalogue BD-08 562

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Other stars in Eridanus