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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
SunriseRise: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
sunny DaytimeWhat's Visible Now?
All Constellations » Perseus » 

11 Persei

Altitude: 60.5°   Azimuth: 63.0°   Direction: East-North-East

11 Persei is a giant star in the constellation of Perseus.

11 Persei visual magnitude is 5.77. Because of its reltive faintness, 11 Persei should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 11 Persei is 0.034 arcsec per year in Right Ascension and -0.027 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 11 Persei star
DSS2 image of 11 Persei. The red arrow shows the motion of 11 Persei during the next 10000 years (5.67 arcmin in Right Ascension and -4.50 arcmin in declination);

Key facts about 11 Persei

5.77
Giant

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

Altitude: 60.5°
Azimuth: 63.0°
Direction: East-North-East

Celestial coordinates and finder chart of 11 Persei

11 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 11 Persei are provided in the following table:

02h 43m 02s
+55° 06’ 20”
138.51°
-4.35°
Perseus

The simplified sky map below shows the position of 11 Persei in the sky:

Finder chart 11 Persei star
Simplified finder chart for 11 Persei.

Visibility of 11 Persei from your location

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

11 Persei is circumpolar and transits at 15:59 UTC (altitude: 86.4°)

Distance of 11 Persei from the Sun and relative movement

11 Persei is distant 420.10 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

128.87 pc
420.10 ly
-2 km/s
0.034 arcsec/year
-0.027 arcsec/year

Spectral properties of 11 Persei

11 Persei belongs to spectral class B7 and has a luminosity class of III corresponding to a giant star. 11 Persei is also a Hg chemically peculiar star.

0.22
B7III
12103K

The red dot in the diagram below shows where 11 Persei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 11 Persei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 11 Persei

SAO23555
SAO23555