φ1 Ceti (phi1 Ceti)

Altitude: -25.8° Azimuth: 73.9° Direction: East-North-East

φ1 Ceti is a variable hypergiant star in the constellation of Cetus.

φ1 Ceti visual magnitude is 4.76. Because of its moderate brightness, φ1 Ceti 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 φ1 Ceti:

Color of φ1 Ceti ⬤

Magnitude of φ1 Ceti 4.76

Class Hypergiant

VISIBILITY RIGHT NOW

φ1 Ceti (phi1 Ceti) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -25.8°
Azimuth: 73.9°
Direction: East-North-East

Celestial coordinates and finder chart of φ1 Ceti

φ1 Ceti 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 φ1 Ceti are provided in the following table:

Right Ascension J2000 00h 44m 11s

Declination J2000 -10° 36’ 33”

Galactic Longitude 116.69°

Galactic Latitude -73.39°

Constellation Cetus

The simplified sky map below shows the position of φ1 Ceti in the sky:

Simplified finder chart for φ1 Ceti (phi1 Ceti).

Visibility of φ1 Ceti 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 φ1 Ceti (phi1 Ceti) 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: 100.6° RISE 15:10

Max altitude: 27.9° TRANSIT 20:14

Azimuth: 259.4° SET 1:22

Digitized Sky Survey image of φ1 Ceti

The image below is a photograph of φ1 Ceti 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 φ1 Ceti is -0.009 arcsec per year in Right Ascension and -0.113 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of φ1 Ceti. The red arrow shows the motion of φ1 Ceti during the next 1000 years (-0.15 arcmin in Right Ascension and -1.88 arcmin in declination);

Distance of φ1 Ceti from the Sun and relative movement

φ1 Ceti is distant 209.78 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

Distance (parsec) 64.35 pc

Distance (light year) 209.78 ly

Heliocentric radial velocity 1 km/s

Proper Motion RA -0.009 arcsec/year

Proper Motion Dec -0.113 arcsec/year

Spectral properties of φ1 Ceti

φ1 Ceti belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.72

Spectral Type K0III

Color Index (B-V) 1.01

Temperature of φ1 Ceti 4719K

The red dot in the diagram below shows where φ1 Ceti is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of φ1 Ceti. Attribution: Richard Powell / CC BY-SA

Alternative designations of φ1 Ceti

Bayer designation φ1 Ceti
(phi1 Ceti)

Flamsteed designation 17 Ceti

Henry Draper Catalogue HD4188

SAO Catalogue SAO147423

Hipparcos Catalogue HIP3455

Durchmusterung Catalogue BD-11 128

FK5 Catalogue 2048

General Catalogue of Variable Stars 278

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In Evidence

Other stars in Cetus