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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cetus » 

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:


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:

00h 44m 11s
-10° 36’ 33”

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

Finder chart φ1 Ceti (phi1 Ceti) star
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°
Max altitude: 27.9°
Azimuth: 259.4°

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.

Image of φ1 Ceti (phi1 Ceti) star
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.

64.35 pc
209.78 ly
1 km/s
-0.009 arcsec/year
-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.


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

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

Alternative designations of φ1 Ceti

φ1 Ceti
(phi1 Ceti)