Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23

Mira - ο Ceti (omicron Ceti)

Mira, also designated as ο Ceti (omicron Ceti), is a variable and multiple giant star in the constellation of Cetus.

Mira visual magnitude is 3.04. Because of its moderate brightness, Mira 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 Mira:

Mira - ο Ceti (omicron Ceti) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 27°.

Celestial coordinates and finder chart of Mira

Mira 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 Mira are provided in the following table:

02h 19m 20s
-02° 58’ 39”

The simplified sky map below shows the position of Mira in the sky:

Finder chart Mira - ο Ceti (omicron Ceti) star
Simplified finder chart for Mira - ο Ceti (omicron Ceti).

Visibility of Mira from your location

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

Today's Mira - ο Ceti (omicron Ceti) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 93.0°
Max altitude: 35.5°
Azimuth: 267.0°
Mira - ο Ceti (omicron Ceti) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Mira

The image below is a photograph of Mira 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 Mira is -0.008 arcsec per year in Right Ascension and -0.237 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Mira - ο Ceti (omicron Ceti) star
DSS2 image of Mira. The red arrow shows the motion of Mira during the next 1000 years (-0.13 arcmin in Right Ascension and -3.95 arcmin in declination);

Distance of Mira from the Sun and relative movement

Mira is distant 418.49 light years from the Sun and it is moving far from the Sun at the speed of 64 kilometers per second.

128.37 pc
418.49 ly
64 km/s
-0.008 arcsec/year
-0.237 arcsec/year

Spectral properties of Mira

Mira belongs to spectral class M7 and has a luminosity class of III corresponding to a giant star.


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

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

Mira star system properties

Mira is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Mira double sysyem:

118.7 arcsec

Alternative designations of Mira

ο Ceti
(omicron Ceti)