4 Cassiopeiae

4 Cassiopeiae is a variable and multiple giant star in the constellation of Cassiopeia.

4 Cassiopeiae visual magnitude is 4.98. Because of its moderate brightness, 4 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 4 Cassiopeiae:

Color of 4 Cassiopeiae ⬤

Magnitude of 4 Cassiopeiae 4.98

Class Giant

VISIBILITY RIGHT NOW 4 Cassiopeiae is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 71°.

Celestial coordinates and finder chart of 4 Cassiopeiae

4 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 4 Cassiopeiae are provided in the following table:

Right Ascension J2000 23h 24m 50s

Declination J2000 +62° 16’ 58”

Galactic Longitude 113.05°

Galactic Latitude 1.08°

Constellation Cassiopeia

The simplified sky map below shows the position of 4 Cassiopeiae in the sky:

Simplified finder chart for 4 Cassiopeiae.

Visibility of 4 Cassiopeiae from your location

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

4 Cassiopeiae is circumpolar and transits at 06:54 UTC (altitude: 79.2°)

Digitized Sky Survey image of 4 Cassiopeiae

The image below is a photograph of 4 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 4 Cassiopeiae is 0.011 arcsec per year in Right Ascension and -0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 4 Cassiopeiae. The red arrow shows the motion of 4 Cassiopeiae during the next 10000 years (1.83 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of 4 Cassiopeiae from the Sun and relative movement

4 Cassiopeiae is distant 770.69 light years from the Sun and it is moving towards the Sun at the speed of 37 kilometers per second.

Distance (parsec) 236.41 pc

Distance (light year) 770.69 ly

Heliocentric radial velocity -37 km/s

Proper Motion RA 0.011 arcsec/year

Proper Motion Dec -0.013 arcsec/year

Spectral properties of 4 Cassiopeiae

4 Cassiopeiae belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.89

Spectral Type M1III

Color Index (B-V) 1.68

Temperature of 4 Cassiopeiae 3541K

The red dot in the diagram below shows where 4 Cassiopeiae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 4 Cassiopeiae. Attribution: Richard Powell / CC BY-SA

4 Cassiopeiae star system properties

4 Cassiopeiae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 4 Cassiopeiae double sysyem:

Main star magnitude 4.98

Secondary star magnitude 7.48

Magnitude difference 2.5

Separation 98.6 arcsec

Alternative designations of 4 Cassiopeiae

Flamsteed designation 4 Cassiopeiae

Henry Draper Catalogue HD220652

SAO Catalogue SAO20614

Hipparcos Catalogue HIP115590

Durchmusterung Catalogue BD+61 2444

FK5 Catalogue 882

General Catalogue of Variable Stars 14549

In Evidence

Other stars in Cassiopeia