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Transit: 13:15 
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All Constellations » Perseus » 

θ Persei (theta Persei)

Above the horizon.  Circumpolar today
Alt: 29.83°   Az: 47.08°   Direction: North-East

θ Persei is a variable and multiple main-sequence star of spectral class F8 in the constellation of Perseus.

θ Persei visual magnitude is 4.12. Because of its moderate brightness, θ 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 θ Persei (theta Persei) star
DSS2 image of θ Persei. The red arrow shows the motion of θ Persei during the next 1000 years (5.60 arcmin in Right Ascension and -1.48 arcmin in declination);

Celestial Coordinates

Apparent

02h 45m 56s
+49° 20’ 06”
17h 08m 29s
19h 54m 25s

J2000

02h 44m 12s
+49° 13’ 41”

Galactic Coordinates

141.16°
-9.61°

Finder Chart

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Finder chart for θ Persei (theta Persei).

Magnitude, Color, Spectral Class

4.12
Main-sequence

3.87
F8V
6435K

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

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

Star System Properties

θ 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 θ Persei double sysyem:

4.12
9.72
5.6
19.6 arcsec

Distance, Radial Speed, Proper Motion

θ Persei is distant 36.62 light years from the Sun and it is moving far from the Sun at the speed of 25 kilometers per second.

11.23
36.62
25 km/s
0.336 arcsec/y
-0.089"/y

Alternative Designations

θ Persei
(theta Persei)
SAO38288
SAO38288
Gl 107 A

Visibility from Your Location

θ Persei (theta Persei) is circumpolar and transits at 06:58 UTC (altitude: 88.4°)