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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
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All Constellations » Perseus » 

43 Persei

Altitude: 19.9°   Azimuth: 330.1°   Direction: North-North-West

43 Persei is a multiple sub-giant star in the constellation of Perseus.

43 Persei visual magnitude is 5.28. Because of its reltive faintness, 43 Persei 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 43 Persei:


43 Persei is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 19.9°
Azimuth: 330.1°
Direction: North-North-West

Celestial coordinates and finder chart of 43 Persei

43 Persei is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 43 Persei are provided in the following table:

03h 56m 36s
+50° 41’ 43”

The simplified sky map below shows the position of 43 Persei in the sky:

Finder chart 43 Persei star
Simplified finder chart for 43 Persei.

Visibility of 43 Persei from your location

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

43 Persei is circumpolar and transits at 23:18 UTC (altitude: 89.2°)

Digitized Sky Survey image of 43 Persei

The image below is a photograph of 43 Persei 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 43 Persei is 0.091 arcsec per year in Right Ascension and -0.13 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 43 Persei star
DSS2 image of 43 Persei. The red arrow shows the motion of 43 Persei during the next 1000 years (1.52 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of 43 Persei from the Sun and relative movement

43 Persei is distant 133.01 light years from the Sun and it is moving far from the Sun at the speed of 27 kilometers per second.

40.80 pc
133.01 ly
27 km/s
0.091 arcsec/year
-0.13 arcsec/year

Spectral properties of 43 Persei

43 Persei belongs to spectral class F5 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 43 Persei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 43 Persei. Attribution: Richard Powell / CC BY-SA

43 Persei star system properties

43 Persei 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 43 Persei double sysyem:

75.3 arcsec

Alternative designations of 43 Persei