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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 » 

θ Delphini (theta Delphini)

Altitude: 36.3°   Azimuth: 242.4°   Direction: West-South-West

θ Delphini is a supergiant star in the constellation of Delphinus.

θ Delphini visual magnitude is 5.72. Because of its reltive faintness, θ 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 θ Delphini:

5.72
Supergiant

θ Delphini (theta Delphini) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 36.3°
Azimuth: 242.4°
Direction: West-South-West

Celestial coordinates and finder chart of θ Delphini

θ 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 θ Delphini are provided in the following table:

20h 38m 43s
+13° 18’ 53”
57.95°
-16.61°
Delphinus

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

Finder chart θ Delphini (theta Delphini) star
Simplified finder chart for θ Delphini (theta Delphini).

Visibility of θ 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 θ Delphini (theta 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: 76.7°
Max altitude: 51.8°
Azimuth: 283.3°

Digitized Sky Survey image of θ Delphini

The image below is a photograph of θ 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 θ Delphini is -0.001 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of θ Delphini (theta Delphini) star
DSS2 image of θ Delphini. The red arrow shows the motion of θ Delphini during the next 100000 years (-1.67 arcmin in Right Ascension and -6.67 arcmin in declination);

Distance of θ Delphini from the Sun and relative movement

θ Delphini is distant 1,304.00 light years from the Sun and it is moving towards the Sun at the speed of 14 kilometers per second.

400.00 pc
1,304.00 ly
-14 km/s
-0.001 arcsec/year
-0.004 arcsec/year

Spectral properties of θ Delphini

θ Delphini belongs to spectral class K3 and has a luminosity class of I corresponding to a supergiant star.

-2.29
K3I
3749K

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

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

Alternative designations of θ Delphini

θ Delphini
(theta Delphini)
SAO106342
SAO106342