Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:09 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Perseus » 

10 Persei

Altitude: 21.9°   Azimuth: 19.9°   Direction: North-North-East

10 Persei is a variable supergiant star in the constellation of Perseus.

10 Persei visual magnitude is 6.25. Because of its reltive faintness, 10 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 10 Persei:


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

Altitude: 21.9°
Azimuth: 19.9°
Direction: North-North-East

Celestial coordinates and finder chart of 10 Persei

10 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 10 Persei are provided in the following table:

02h 25m 15s
+56° 36’ 35”

The simplified sky map below shows the position of 10 Persei in the sky:

Finder chart 10 Persei star
Simplified finder chart for 10 Persei.

Visibility of 10 Persei from your location

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

10 Persei is circumpolar and transits at 09:27 UTC (altitude: 84.9°)

Digitized Sky Survey image of 10 Persei

The image below is a photograph of 10 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 10 Persei is -0.002 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 10 Persei star
DSS2 image of 10 Persei. The red arrow shows the motion of 10 Persei during the next 100000 years (-3.33 arcmin in Right Ascension and 13.33 arcmin in declination);

Distance of 10 Persei from the Sun and relative movement

10 Persei is distant 3,543.48 light years from the Sun and it is moving towards the Sun at the speed of 46 kilometers per second.

1,086.96 pc
3,543.48 ly
-46 km/s
-0.002 arcsec/year
0.008 arcsec/year

Spectral properties of 10 Persei

10 Persei belongs to spectral class B2 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where 10 Persei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 10 Persei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 10 Persei