Aldulfin - ε Delphini (epsilon Delphini)

Below the horizon. Rise: 20:55 | Tran: 3:55 | Set: 10:52

Alt: -26.44° Az: 348.19° Direction: North-North-West

Aldulfin, also designated as ε Delphini (epsilon Delphini), is a variable giant star of spectral class B6 in the constellation of Delphinus.

Aldulfin visual magnitude is 4.03. Because of its moderate brightness, Aldulfin 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 Aldulfin - ε Delphini (epsilon Delphini) star

DSS2 image of Aldulfin. The red arrow shows the motion of Aldulfin during the next 10000 years (2.17 arcmin in Right Ascension and -3.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 34m 25s

Declination +11° 23’ 29”

Hour Angle 11h 16m 54s

Sidereal Time 07h 51m 20s

J2000

Right Ascension 20h 33m 12s

Declination +11° 18’ 11”

Galactic Coordinates

Galactic Longitude 55.42°

Galactic Latitude -16.59°

Finder Chart

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Finder chart for Aldulfin - ε Delphini (epsilon Delphini).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.03

Class Giant

Absolute magnitude -1.18

Spectral Type B6III

Color Index (B-V) -0.13

Temperature 12103K

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

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

Distance, Radial Speed, Proper Motion

Aldulfin is distant 358.64 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

Distance (parsec) 110.01

Distance (light year) 358.64

Radial Speed -19 km/s

Proper Motion RA 0.013 arcsec/y

Proper Motion Dec -0.022"/y

Alternative Designations

Proper Name Aldulfin

Bayer designation ε Delphini
(epsilon Delphini)

Flamsteed designation 2 Delphini

Henry Draper Catalogue HD195810

SAO Catalogue SAO106230

Hipparcos Catalogue HIP101421

Durchmusterung Catalogue BD+10 4321

FK5 Catalogue 768

General Catalogue of Variable Stars 13137

Visibility from Your Location

Today's Aldulfin - ε Delphini (epsilon Delphini) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 78.6° RISE 20:55

Max altitude: 49.9° TRANSIT 3:55

Azimuth: 281.4° SET 10:52

Set Location

Other stars in Delphinus