δ Persei (delta Persei)

Above the horizon. Rise: 0:51 | Tran: 11:57 | Set: 23:00

Alt: 78.62° Az: 50.64° Direction: North-East

δ Persei is a variable and double giant star of spectral class B5 in the constellation of Perseus.

δ Persei visual magnitude is 3.01. Because of its moderate brightness, δ 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.

DSS2 image of δ Persei. The red arrow shows the motion of δ Persei during the next 10000 years (4.67 arcmin in Right Ascension and -5.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 03h 44m 44s

Declination +47° 52’ 00”

Hour Angle 23h 07m 24s

Sidereal Time 02h 52m 08s

J2000

Right Ascension 03h 42m 55s

Declination +47° 47’ 15”

Galactic Coordinates

Galactic Longitude 150.28°

Galactic Latitude -5.77°

Finder Chart

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Finder chart for δ Persei (delta Persei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.01

Class Giant

Absolute magnitude -3.04

Spectral Type B5III

Color Index (B-V) -0.13

Temperature 12103K

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

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

Star System Properties

δ 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 δ Persei double sysyem:

Main star magnitude 3.01

Secondary star magnitude 10.31

Magnitude difference 7.3

Separation 99.1 arcsec

Distance, Radial Speed, Proper Motion

δ Persei is distant 527.51 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 161.81

Distance (light year) 527.51

Radial Speed 4 km/s

Proper Motion RA 0.028 arcsec/y

Proper Motion Dec -0.034"/y

Alternative Designations

Bayer designation δ Persei
(delta Persei)

Flamsteed designation 39 Persei

Henry Draper Catalogue HD22928

SAO Catalogue SAO39053

Hipparcos Catalogue HIP17358

Durchmusterung Catalogue BD+47 876

FK5 Catalogue 131

General Catalogue of Variable Stars Del Per

Visibility from Your Location

Today's δ Persei (delta Persei) rise, transit and set times from Shijak, Albania are the following (all times relative to the local timezone Europe/Tirane):

Azimuth: 42.1° RISE 0:51

Max altitude: 83.5° TRANSIT 11:57

Azimuth: 317.9° SET 23:00

Name:	Shijak, Albania
Latitude:	41° 20' 44.2" N
Longitude:	19° 34' 1.9" E
Timezone:	Europe/Tirane

Set Location

Other stars in Perseus