Your Guide to the Solar System and the Night Sky
This site is free and ad-free thanks to the support of our users. If you can, please consider a donation.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:57  
clear_day Transit: 12:48  
SunsetSet: 18:39 south
sleep NighttimeWhat's Visible Now
All Constellations » Delphinus » 

γ1 Delphini (gamma1 Delphini)

Altitude: 28.8°   Azimuth: 259.5°   Direction: West

γ1 Delphini is a double main-sequence star in the constellation of Delphinus.

γ1 Delphini visual magnitude is 5.14. Because of its reltive faintness, γ1 Delphini should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about γ1 Delphini:


γ1 Delphini (gamma1 Delphini) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 28.8°
Azimuth: 259.5°
Direction: West

Celestial coordinates and finder chart of γ1 Delphini

γ1 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 γ1 Delphini are provided in the following table:

20h 46m 38s
+16° 07’ 27”

The simplified sky map below shows the position of γ1 Delphini in the sky:

Finder chart γ1 Delphini (gamma1 Delphini) star
Simplified finder chart for γ1 Delphini (gamma1 Delphini).

Visibility of γ1 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 γ1 Delphini (gamma1 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: 73.9°
Max altitude: 54.6°
Azimuth: 286.1°

Digitized Sky Survey image of γ1 Delphini

The image below is a photograph of γ1 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 γ1 Delphini is -0.03 arcsec per year in Right Ascension and -0.191 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of γ1 Delphini (gamma1 Delphini) star
DSS2 image of γ1 Delphini. The red arrow shows the motion of γ1 Delphini during the next 1000 years (-0.50 arcmin in Right Ascension and -3.18 arcmin in declination);

Distance of γ1 Delphini from the Sun and relative movement

γ1 Delphini is distant 102.87 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

31.56 pc
102.87 ly
-7 km/s
-0.03 arcsec/year
-0.191 arcsec/year

Spectral properties of γ1 Delphini

γ1 Delphini belongs to spectral class F7 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where γ1 Delphini is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of γ1 Delphini. Attribution: Richard Powell / CC BY-SA

γ1 Delphini star system properties

γ1 Delphini 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 γ1 Delphini double sysyem:

9.8 arcsec

Alternative designations of γ1 Delphini

γ1 Delphini
(gamma1 Delphini)
12 Delphini