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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: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Perseus » 

30 Persei

Altitude: 23.9°   Azimuth: 48.3°   Direction: North-East

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

30 Persei visual magnitude is 5.47. Because of its reltive faintness, 30 Persei should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of 30 Persei is 0.032 arcsec per year in Right Ascension and -0.029 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 30 Persei star
DSS2 image of 30 Persei. The red arrow shows the motion of 30 Persei during the next 10000 years (5.33 arcmin in Right Ascension and -4.83 arcmin in declination);

Key facts about 30 Persei


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

Altitude: 23.9°
Azimuth: 48.3°
Direction: North-East

Celestial coordinates and finder chart of 30 Persei

30 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 30 Persei are provided in the following table:

03h 17m 47s
+44° 01’ 29”

The simplified sky map below shows the position of 30 Persei in the sky:

Finder chart 30 Persei star
Simplified finder chart for 30 Persei.

Visibility of 30 Persei from your location

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

30 Persei is circumpolar and transits at 17:05 UTC (altitude: 82.5°)

Distance of 30 Persei from the Sun and relative movement

30 Persei is distant 644.27 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

197.63 pc
644.27 ly
-1 km/s
0.032 arcsec/year
-0.029 arcsec/year

Spectral properties of 30 Persei

30 Persei belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 30 Persei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 30 Persei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 30 Persei