Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]

55 Cassiopeiae

55 Cassiopeiae is a variable hypergiant star in the constellation of Cassiopeia.

55 Cassiopeiae visual magnitude is 6.07. Because of its reltive faintness, 55 Cassiopeiae 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 55 Cassiopeiae:

6.07
Hypergiant
55 Cassiopeiae is above the horizon from Greenwich, United Kingdom [change]. Altitude: 29°.

Celestial coordinates and finder chart of 55 Cassiopeiae

55 Cassiopeiae is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 55 Cassiopeiae are provided in the following table:

02h 14m 29s
+66° 31’ 27”
131.08°
4.98°
Cassiopeia

The simplified sky map below shows the position of 55 Cassiopeiae in the sky:

Finder chart 55 Cassiopeiae star
Simplified finder chart for 55 Cassiopeiae.

Visibility of 55 Cassiopeiae from your location

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

55 Cassiopeiae is circumpolar and transits at 17:08 UTC (altitude: 75.0°)

Digitized Sky Survey image of 55 Cassiopeiae

The image below is a photograph of 55 Cassiopeiae 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 55 Cassiopeiae is -0.006 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 55 Cassiopeiae star
DSS2 image of 55 Cassiopeiae. The red arrow shows the motion of 55 Cassiopeiae during the next 100000 years (-10.00 arcmin in Right Ascension and -10.00 arcmin in declination);

Distance of 55 Cassiopeiae from the Sun and relative movement

55 Cassiopeiae is distant 737.56 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

226.24 pc
737.56 ly
-12 km/s
-0.006 arcsec/year
-0.006 arcsec/year

Spectral properties of 55 Cassiopeiae

55 Cassiopeiae belongs to spectral class G0 and has a luminosity class of II corresponding to a hypergiant star.

-0.70
G0II
5853K

The red dot in the diagram below shows where 55 Cassiopeiae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 55 Cassiopeiae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 55 Cassiopeiae

55 Cassiopeiae
SAO12180
SAO12180