Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:57  
clear_day Transit: 12:48  
SunsetSet: 18:39 south
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All Constellations » Delphinus » 

15 Delphini

Altitude: 27.6°   Azimuth: 254.7°   Direction: West-South-West

15 Delphini is a multiple main-sequence star in the constellation of Delphinus.

15 Delphini visual magnitude is 5.98. Because of its reltive faintness, 15 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 15 Delphini:


15 Delphini is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 27.6°
Azimuth: 254.7°
Direction: West-South-West

Celestial coordinates and finder chart of 15 Delphini

15 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 15 Delphini are provided in the following table:

20h 49m 37s
+12° 32’ 43”

The simplified sky map below shows the position of 15 Delphini in the sky:

Finder chart 15 Delphini star
Simplified finder chart for 15 Delphini.

Visibility of 15 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 15 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: 77.5°
Max altitude: 51.1°
Azimuth: 282.5°

Digitized Sky Survey image of 15 Delphini

The image below is a photograph of 15 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 15 Delphini is 0.057 arcsec per year in Right Ascension and 0.098 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 15 Delphini star
DSS2 image of 15 Delphini. The red arrow shows the motion of 15 Delphini during the next 1000 years (0.95 arcmin in Right Ascension and 1.63 arcmin in declination);

Distance of 15 Delphini from the Sun and relative movement

15 Delphini is distant 96.42 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

29.58 pc
96.42 ly
2 km/s
0.057 arcsec/year
0.098 arcsec/year

Spectral properties of 15 Delphini

15 Delphini belongs to spectral class F5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 15 Delphini is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of 15 Delphini. Attribution: Richard Powell / CC BY-SA

15 Delphini star system properties

15 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 15 Delphini double sysyem:

108 arcsec

Alternative designations of 15 Delphini

15 Delphini