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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:58 
Transit: 12:56 
Sunset: 20:55
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All Constellations » Perseus » 

μ Persei (mu Persei)

Above the horizon.  Circumpolar today
Alt: 14.98°   Az: 24.75°   Direction: North-North-East

μ Persei is a variable and multiple hypergiant star of spectral class G0 in the constellation of Perseus.

μ Persei visual magnitude is 4.14. Because of its moderate brightness, μ Persei is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of μ Persei (mu Persei) star
DSS2 image of μ Persei. The red arrow shows the motion of μ Persei during the next 10000 years (0.83 arcmin in Right Ascension and -3.00 arcmin in declination);

Celestial Coordinates

Apparent

04h 16m 46s
+48° 28’ 17”
14h 30m 20s
18h 47m 06s

J2000

04h 14m 53s
+48° 24’ 33”

Galactic Coordinates

153.94°
-1.82°

Finder Chart

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Finder chart for μ Persei (mu Persei).

Magnitude, Color, Spectral Class

4.14
Hypergiant

-2.59
G0I
4866K

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

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

Star System Properties

μ Persei is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the μ Persei double sysyem:

4.14
10.14
6
83.8 arcsec

Distance, Radial Speed, Proper Motion

μ Persei is distant 722.84 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

221.73
722.84
8 km/s
0.005 arcsec/y
-0.018"/y

Alternative Designations

μ Persei
(mu Persei)
SAO39404
SAO39404

Visibility from Your Location

μ Persei (mu Persei) is circumpolar and transits at 12:11 UTC (altitude: 87.0°)