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

42 Cassiopeiae

42 Cassiopeiae is a variable main-sequence star in the constellation of Cassiopeia.

42 Cassiopeiae visual magnitude is 5.18. Because of its reltive faintness, 42 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 42 Cassiopeiae:

5.18
Main-sequence
42 Cassiopeiae is above the horizon from Greenwich, United Kingdom [change]. Altitude: 36°.

Celestial coordinates and finder chart of 42 Cassiopeiae

42 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 42 Cassiopeiae are provided in the following table:

01h 42m 55s
+70° 37’ 21”
127.21°
8.18°
Cassiopeia

The simplified sky map below shows the position of 42 Cassiopeiae in the sky:

Finder chart 42 Cassiopeiae star
Simplified finder chart for 42 Cassiopeiae.

Visibility of 42 Cassiopeiae from your location

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

42 Cassiopeiae is circumpolar and transits at 16:32 UTC (altitude: 70.9°)

Digitized Sky Survey image of 42 Cassiopeiae

The image below is a photograph of 42 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 42 Cassiopeiae is 0.077 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.

Image of 42 Cassiopeiae star
DSS2 image of 42 Cassiopeiae. The red arrow shows the motion of 42 Cassiopeiae during the next 10000 years (12.83 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of 42 Cassiopeiae from the Sun and relative movement

42 Cassiopeiae is distant 280.55 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

86.06 pc
280.55 ly
6 km/s
0.077 arcsec/year
-0.013 arcsec/year

Spectral properties of 42 Cassiopeiae

42 Cassiopeiae belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

0.51
B9V
10653K

The red dot in the diagram below shows where 42 Cassiopeiae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 42 Cassiopeiae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 42 Cassiopeiae

42 Cassiopeiae
SAO4470
SAO4470