We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:45  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sleep NighttimeWhat's Visible Now?
All Constellations » Perseus » 

48 Persei

Altitude: 77.9°   Azimuth: 258.9°   Direction: West

48 Persei is a variable main-sequence star in the constellation of Perseus.

48 Persei visual magnitude is 4.04. Because of its moderate brightness, 48 Persei 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 48 Persei:


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

Altitude: 77.9°
Azimuth: 258.9°
Direction: West

Celestial coordinates and finder chart of 48 Persei

48 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 48 Persei are provided in the following table:

04h 08m 39s
+47° 42’ 44”

The simplified sky map below shows the position of 48 Persei in the sky:

Finder chart 48 Persei star
Simplified finder chart for 48 Persei.

Visibility of 48 Persei from your location

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

48 Persei is circumpolar and transits at 23:14 UTC (altitude: 86.2°)

Digitized Sky Survey image of 48 Persei

The image below is a photograph of 48 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 48 Persei is 0.021 arcsec per year in Right Ascension and -0.03 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 48 Persei star
DSS2 image of 48 Persei. The red arrow shows the motion of 48 Persei during the next 10000 years (3.50 arcmin in Right Ascension and -5.00 arcmin in declination);

Distance of 48 Persei from the Sun and relative movement

48 Persei is distant 553.48 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

169.78 pc
553.48 ly
1 km/s
0.021 arcsec/year
-0.03 arcsec/year

Spectral properties of 48 Persei

48 Persei belongs to spectral class B3 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 48 Persei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 48 Persei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 48 Persei