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: 6:59  
clear_day Transit: 12:48  
SunsetSet: 18:36 south
sunny DaytimeWhat's Visible Now
All Constellations » Perseus » 

16 Persei

Altitude: 6.4°   Azimuth: 329.4°   Direction: North-North-West

16 Persei is a variable and multiple giant star in the constellation of Perseus.

16 Persei visual magnitude is 4.23. Because of its moderate brightness, 16 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 16 Persei:


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

Altitude: 6.4°
Azimuth: 329.4°
Direction: North-North-West

Celestial coordinates and finder chart of 16 Persei

16 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 16 Persei are provided in the following table:

02h 50m 35s
+38° 19’ 06”

The simplified sky map below shows the position of 16 Persei in the sky:

Finder chart 16 Persei star
Simplified finder chart for 16 Persei.

Visibility of 16 Persei from your location

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

Today's 16 Persei rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 51.7°
Max altitude: 76.8°
Azimuth: 308.3°

Digitized Sky Survey image of 16 Persei

The image below is a photograph of 16 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 16 Persei is 0.197 arcsec per year in Right Ascension and -0.105 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 16 Persei star
DSS2 image of 16 Persei. The red arrow shows the motion of 16 Persei during the next 1000 years (3.28 arcmin in Right Ascension and -1.75 arcmin in declination);

Distance of 16 Persei from the Sun and relative movement

16 Persei is distant 127.64 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

39.15 pc
127.64 ly
14 km/s
0.197 arcsec/year
-0.105 arcsec/year

Spectral properties of 16 Persei

16 Persei belongs to spectral class F2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 16 Persei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 16 Persei. Attribution: Richard Powell / CC BY-SA

16 Persei star system properties

16 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 16 Persei double sysyem:

249.3 arcsec

Alternative designations of 16 Persei