ψ Cassiopeiae (psi Cassiopeiae)

ψ Cassiopeiae is a multiple hypergiant star in the constellation of Cassiopeia.

ψ Cassiopeiae visual magnitude is 4.74. Because of its moderate brightness, ψ Cassiopeiae 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 ψ Cassiopeiae:

Color of ψ Cassiopeiae ⬤

Magnitude of ψ Cassiopeiae 4.74

Class Hypergiant

VISIBILITY RIGHT NOW ψ Cassiopeiae (psi Cassiopeiae) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 39°.

Celestial coordinates and finder chart of ψ Cassiopeiae

ψ 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 ψ Cassiopeiae are provided in the following table:

Right Ascension J2000 01h 25m 55s

Declination J2000 +68° 07’ 47”

Galactic Longitude 126.15°

Galactic Latitude 5.47°

Constellation Cassiopeia

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

Finder chart ψ Cassiopeiae (psi Cassiopeiae) star

Simplified finder chart for ψ Cassiopeiae (psi Cassiopeiae).

Visibility of ψ Cassiopeiae from your location

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

ψ Cassiopeiae (psi Cassiopeiae) is circumpolar and transits at 13:18 UTC (altitude: 73.4°)

Digitized Sky Survey image of ψ Cassiopeiae

The image below is a photograph of ψ 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 ψ Cassiopeiae is 0.074 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ψ Cassiopeiae (psi Cassiopeiae) star

DSS2 image of ψ Cassiopeiae. The red arrow shows the motion of ψ Cassiopeiae during the next 10000 years (12.33 arcmin in Right Ascension and 4.33 arcmin in declination);

Distance of ψ Cassiopeiae from the Sun and relative movement

ψ Cassiopeiae is distant 193.01 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 59.21 pc

Distance (light year) 193.01 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA 0.074 arcsec/year

Proper Motion Dec 0.026 arcsec/year

Spectral properties of ψ Cassiopeiae

ψ Cassiopeiae belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.88

Spectral Type K0III

Color Index (B-V) 1.05

Temperature of ψ Cassiopeiae 4626K

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

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

ψ Cassiopeiae star system properties

ψ Cassiopeiae is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the ψ Cassiopeiae double sysyem:

Main star magnitude 4.74

Secondary star magnitude 9.94

Magnitude difference 5.2

Separation 23.2 arcsec

Alternative designations of ψ Cassiopeiae

Bayer designation ψ Cassiopeiae
(psi Cassiopeiae)

Flamsteed designation 36 Cassiopeiae

Henry Draper Catalogue HD8491

SAO Catalogue SAO11751

Hipparcos Catalogue HIP6692

Durchmusterung Catalogue BD+67 123

FK5 Catalogue 46

Aitken Double Star Catalogue ADS1129

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Other stars in Cassiopeia