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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:55  
clear_day Transit: 12:49  
SunsetSet: 18:41 south
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All Constellations » Delphinus » 

δ Delphini (delta Delphini)

Altitude: 35.4°   Azimuth: 247.6°   Direction: West-South-West

δ Delphini is a variable giant star in the constellation of Delphinus.

δ Delphini visual magnitude is 4.43. Because of its moderate brightness, δ Delphini 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 δ Delphini:


δ Delphini (delta Delphini) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 35.4°
Azimuth: 247.6°
Direction: West-South-West

Celestial coordinates and finder chart of δ Delphini

δ Delphini is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of δ Delphini are provided in the following table:

20h 43m 27s
+15° 04’ 27”

The simplified sky map below shows the position of δ Delphini in the sky:

Finder chart δ Delphini (delta Delphini) star
Simplified finder chart for δ Delphini (delta Delphini).

Visibility of δ Delphini 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 δ Delphini (delta Delphini) 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: 74.9°
Max altitude: 53.6°
Azimuth: 285.1°

Digitized Sky Survey image of δ Delphini

The image below is a photograph of δ Delphini 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 δ Delphini is -0.019 arcsec per year in Right Ascension and -0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of δ Delphini (delta Delphini) star
DSS2 image of δ Delphini. The red arrow shows the motion of δ Delphini during the next 10000 years (-3.17 arcmin in Right Ascension and -7.17 arcmin in declination);

Distance of δ Delphini from the Sun and relative movement

δ Delphini is distant 203.37 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

62.38 pc
203.37 ly
9 km/s
-0.019 arcsec/year
-0.043 arcsec/year

Spectral properties of δ Delphini

δ Delphini belongs to spectral class A7 and has a luminosity class of III corresponding to a giant star. δ Delphini is also a De chemically peculiar star.


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

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

Alternative designations of δ Delphini

δ Delphini
(delta Delphini)
11 Delphini